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<?php /** * Main WordPress Formatting API. * * Handles many functions for formatting output. * * @package WordPress **/ /** * Replaces common plain text characters into formatted entities * * As an example, * <code> * 'cause today's effort makes it worth tomorrow's "holiday"... * </code> * Becomes: * <code> * ’cause today’s effort makes it worth tomorrow’s “holiday”… * </code> * Code within certain html blocks are skipped. * * @since 0.71 * @uses $wp_cockneyreplace Array of formatted entities for certain common phrases * * @param string $text The text to be formatted * @return string The string replaced with html entities */ function wptexturize($text) { global $wp_cockneyreplace; static $static_characters, $static_replacements, $dynamic_characters, $dynamic_replacements, $default_no_texturize_tags, $default_no_texturize_shortcodes; // No need to set up these static variables more than once if ( ! isset( $static_characters ) ) { /* translators: opening curly double quote */ $opening_quote = _x( '“', 'opening curly double quote' ); /* translators: closing curly double quote */ $closing_quote = _x( '”', 'closing curly double quote' ); /* translators: apostrophe, for example in 'cause or can't */ $apos = _x( '’', 'apostrophe' ); /* translators: prime, for example in 9' (nine feet) */ $prime = _x( '′', 'prime' ); /* translators: double prime, for example in 9" (nine inches) */ $double_prime = _x( '″', 'double prime' ); /* translators: opening curly single quote */ $opening_single_quote = _x( '‘', 'opening curly single quote' ); /* translators: closing curly single quote */ $closing_single_quote = _x( '’', 'closing curly single quote' ); /* translators: en dash */ $en_dash = _x( '–', 'en dash' ); /* translators: em dash */ $em_dash = _x( '—', 'em dash' ); $default_no_texturize_tags = array('pre', 'code', 'kbd', 'style', 'script', 'tt'); $default_no_texturize_shortcodes = array('code'); // if a plugin has provided an autocorrect array, use it if ( isset($wp_cockneyreplace) ) { $cockney = array_keys($wp_cockneyreplace); $cockneyreplace = array_values($wp_cockneyreplace); } elseif ( "'" != $apos ) { // Only bother if we're doing a replacement. $cockney = array( "'tain't", "'twere", "'twas", "'tis", "'twill", "'til", "'bout", "'nuff", "'round", "'cause" ); $cockneyreplace = array( $apos . "tain" . $apos . "t", $apos . "twere", $apos . "twas", $apos . "tis", $apos . "twill", $apos . "til", $apos . "bout", $apos . "nuff", $apos . "round", $apos . "cause" ); } else { $cockney = $cockneyreplace = array(); } $static_characters = array_merge( array( '---', ' -- ', '--', ' - ', 'xn–', '...', '``', '\'\'', ' (tm)' ), $cockney ); $static_replacements = array_merge( array( $em_dash, ' ' . $em_dash . ' ', $en_dash, ' ' . $en_dash . ' ', 'xn--', '…', $opening_quote, $closing_quote, ' ™' ), $cockneyreplace ); $dynamic = array(); if ( "'" != $apos ) { $dynamic[ '/\'(\d\d(?:’|\')?s)/' ] = $apos . '$1'; // '99's $dynamic[ '/\'(\d)/' ] = $apos . '$1'; // '99 } if ( "'" != $opening_single_quote ) $dynamic[ '/(\s|\A|[([{<]|")\'/' ] = '$1' . $opening_single_quote; // opening single quote, even after (, {, <, [ if ( '"' != $double_prime ) $dynamic[ '/(\d)"/' ] = '$1' . $double_prime; // 9" (double prime) if ( "'" != $prime ) $dynamic[ '/(\d)\'/' ] = '$1' . $prime; // 9' (prime) if ( "'" != $apos ) $dynamic[ '/(\S)\'([^\'\s])/' ] = '$1' . $apos . '$2'; // apostrophe in a word if ( '"' != $opening_quote ) $dynamic[ '/(\s|\A|[([{<])"(?!\s)/' ] = '$1' . $opening_quote . '$2'; // opening double quote, even after (, {, <, [ if ( '"' != $closing_quote ) $dynamic[ '/"(\s|\S|\Z)/' ] = $closing_quote . '$1'; // closing double quote if ( "'" != $closing_single_quote ) $dynamic[ '/\'([\s.]|\Z)/' ] = $closing_single_quote . '$1'; // closing single quote $dynamic[ '/\b(\d+)x(\d+)\b/' ] = '$1×$2'; // 9x9 (times) $dynamic_characters = array_keys( $dynamic ); $dynamic_replacements = array_values( $dynamic ); } // Transform into regexp sub-expression used in _wptexturize_pushpop_element // Must do this everytime in case plugins use these filters in a context sensitive manner $no_texturize_tags = '(' . implode('|', apply_filters('no_texturize_tags', $default_no_texturize_tags) ) . ')'; $no_texturize_shortcodes = '(' . implode('|', apply_filters('no_texturize_shortcodes', $default_no_texturize_shortcodes) ) . ')'; $no_texturize_tags_stack = array(); $no_texturize_shortcodes_stack = array(); $textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE); foreach ( $textarr as &$curl ) { if ( empty( $curl ) ) continue; // Only call _wptexturize_pushpop_element if first char is correct tag opening $first = $curl[0]; if ( '<' === $first ) { _wptexturize_pushpop_element($curl, $no_texturize_tags_stack, $no_texturize_tags, '<', '>'); } elseif ( '[' === $first ) { _wptexturize_pushpop_element($curl, $no_texturize_shortcodes_stack, $no_texturize_shortcodes, '[', ']'); } elseif ( empty($no_texturize_shortcodes_stack) && empty($no_texturize_tags_stack) ) { // This is not a tag, nor is the texturization disabled static strings $curl = str_replace($static_characters, $static_replacements, $curl); // regular expressions $curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl); } $curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&$1', $curl); } return implode( '', $textarr ); } /** * Search for disabled element tags. Push element to stack on tag open and pop * on tag close. Assumes first character of $text is tag opening. * * @access private * @since 2.9.0 * * @param string $text Text to check. First character is assumed to be $opening * @param array $stack Array used as stack of opened tag elements * @param string $disabled_elements Tags to match against formatted as regexp sub-expression * @param string $opening Tag opening character, assumed to be 1 character long * @param string $opening Tag closing character * @return object */ function _wptexturize_pushpop_element($text, &$stack, $disabled_elements, $opening = '<', $closing = '>') { // Check if it is a closing tag -- otherwise assume opening tag if (strncmp($opening . '/', $text, 2)) { // Opening? Check $text+1 against disabled elements if (preg_match('/^' . $disabled_elements . '\b/', substr($text, 1), $matches)) { /* * This disables texturize until we find a closing tag of our type * (e.g. <pre>) even if there was invalid nesting before that * * Example: in the case <pre>sadsadasd</code>"baba"</pre> * "baba" won't be texturize */ array_push($stack, $matches[1]); } } else { // Closing? Check $text+2 against disabled elements $c = preg_quote($closing, '/'); if (preg_match('/^' . $disabled_elements . $c . '/', substr($text, 2), $matches)) { $last = array_pop($stack); // Make sure it matches the opening tag if ($last != $matches[1]) array_push($stack, $last); } } } /** * Replaces double line-breaks with paragraph elements. * * A group of regex replaces used to identify text formatted with newlines and * replace double line-breaks with HTML paragraph tags. The remaining * line-breaks after conversion become <<br />> tags, unless $br is set to '0' * or 'false'. * * @since 0.71 * * @param string $pee The text which has to be formatted. * @param bool $br Optional. If set, this will convert all remaining line-breaks after paragraphing. Default true. * @return string Text which has been converted into correct paragraph tags. */ function wpautop($pee, $br = true) { $pre_tags = array(); if ( trim($pee) === '' ) return ''; $pee = $pee . "\n"; // just to make things a little easier, pad the end if ( strpos($pee, '<pre') !== false ) { $pee_parts = explode( '</pre>', $pee ); $last_pee = array_pop($pee_parts); $pee = ''; $i = 0; foreach ( $pee_parts as $pee_part ) { $start = strpos($pee_part, '<pre'); // Malformed html? if ( $start === false ) { $pee .= $pee_part; continue; } $name = "<pre wp-pre-tag-$i></pre>"; $pre_tags[$name] = substr( $pee_part, $start ) . '</pre>'; $pee .= substr( $pee_part, 0, $start ) . $name; $i++; } $pee .= $last_pee; } $pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee); // Space things out a little $allblocks = '(?:table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section|article|aside|hgroup|header|footer|nav|figure|figcaption|details|menu|summary)'; $pee = preg_replace('!(<' . $allblocks . '[^>]*>)!', "\n$1", $pee); $pee = preg_replace('!(</' . $allblocks . '>)!', "$1\n\n", $pee); $pee = str_replace(array("\r\n", "\r"), "\n", $pee); // cross-platform newlines if ( strpos($pee, '<object') !== false ) { $pee = preg_replace('|\s*<param([^>]*)>\s*|', "<param$1>", $pee); // no pee inside object/embed $pee = preg_replace('|\s*</embed>\s*|', '</embed>', $pee); } $pee = preg_replace("/\n\n+/", "\n\n", $pee); // take care of duplicates // make paragraphs, including one at the end $pees = preg_split('/\n\s*\n/', $pee, -1, PREG_SPLIT_NO_EMPTY); $pee = ''; foreach ( $pees as $tinkle ) $pee .= '<p>' . trim($tinkle, "\n") . "</p>\n"; $pee = preg_replace('|<p>\s*</p>|', '', $pee); // under certain strange conditions it could create a P of entirely whitespace $pee = preg_replace('!<p>([^<]+)</(div|address|form)>!', "<p>$1</p></$2>", $pee); $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); // don't pee all over a tag $pee = preg_replace("|<p>(<li.+?)</p>|", "$1", $pee); // problem with nested lists $pee = preg_replace('|<p><blockquote([^>]*)>|i', "<blockquote$1><p>", $pee); $pee = str_replace('</blockquote></p>', '</p></blockquote>', $pee); $pee = preg_replace('!<p>\s*(</?' . $allblocks . '[^>]*>)!', "$1", $pee); $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*</p>!', "$1", $pee); if ( $br ) { $pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', '_autop_newline_preservation_helper', $pee); $pee = preg_replace('|(?<!<br />)\s*\n|', "<br />\n", $pee); // optionally make line breaks $pee = str_replace('<WPPreserveNewline />', "\n", $pee); } $pee = preg_replace('!(</?' . $allblocks . '[^>]*>)\s*<br />!', "$1", $pee); $pee = preg_replace('!<br />(\s*</?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)[^>]*>)!', '$1', $pee); $pee = preg_replace( "|\n</p>$|", '</p>', $pee ); if ( !empty($pre_tags) ) $pee = str_replace(array_keys($pre_tags), array_values($pre_tags), $pee); return $pee; } /** * Newline preservation help function for wpautop * * @since 3.1.0 * @access private * @param array $matches preg_replace_callback matches array * @returns string */ function _autop_newline_preservation_helper( $matches ) { return str_replace("\n", "<WPPreserveNewline />", $matches[0]); } /** * Don't auto-p wrap shortcodes that stand alone * * Ensures that shortcodes are not wrapped in <<p>>...<</p>>. * * @since 2.9.0 * * @param string $pee The content. * @return string The filtered content. */ function shortcode_unautop( $pee ) { global $shortcode_tags; if ( empty( $shortcode_tags ) || !is_array( $shortcode_tags ) ) { return $pee; } $tagregexp = join( '|', array_map( 'preg_quote', array_keys( $shortcode_tags ) ) ); $pattern = '/' . '<p>' // Opening paragraph . '\\s*+' // Optional leading whitespace . '(' // 1: The shortcode . '\\[' // Opening bracket . "($tagregexp)" // 2: Shortcode name . '\\b' // Word boundary // Unroll the loop: Inside the opening shortcode tag . '[^\\]\\/]*' // Not a closing bracket or forward slash . '(?:' . '\\/(?!\\])' // A forward slash not followed by a closing bracket . '[^\\]\\/]*' // Not a closing bracket or forward slash . ')*?' . '(?:' . '\\/\\]' // Self closing tag and closing bracket . '|' . '\\]' // Closing bracket . '(?:' // Unroll the loop: Optionally, anything between the opening and closing shortcode tags . '[^\\[]*+' // Not an opening bracket . '(?:' . '\\[(?!\\/\\2\\])' // An opening bracket not followed by the closing shortcode tag . '[^\\[]*+' // Not an opening bracket . ')*+' . '\\[\\/\\2\\]' // Closing shortcode tag . ')?' . ')' . ')' . '\\s*+' // optional trailing whitespace . '<\\/p>' // closing paragraph . '/s'; return preg_replace( $pattern, '$1', $pee ); } /** * Checks to see if a string is utf8 encoded. * * NOTE: This function checks for 5-Byte sequences, UTF8 * has Bytes Sequences with a maximum length of 4. * * @author bmorel at ssi dot fr (modified) * @since 1.2.1 * * @param string $str The string to be checked * @return bool True if $str fits a UTF-8 model, false otherwise. */ function seems_utf8($str) { $length = strlen($str); for ($i=0; $i < $length; $i++) { $c = ord($str[$i]); if ($c < 0x80) $n = 0; # 0bbbbbbb elseif (($c & 0xE0) == 0xC0) $n=1; # 110bbbbb elseif (($c & 0xF0) == 0xE0) $n=2; # 1110bbbb elseif (($c & 0xF8) == 0xF0) $n=3; # 11110bbb elseif (($c & 0xFC) == 0xF8) $n=4; # 111110bb elseif (($c & 0xFE) == 0xFC) $n=5; # 1111110b else return false; # Does not match any model for ($j=0; $j<$n; $j++) { # n bytes matching 10bbbbbb follow ? if ((++$i == $length) || ((ord($str[$i]) & 0xC0) != 0x80)) return false; } } return true; } /** * Converts a number of special characters into their HTML entities. * * Specifically deals with: &, <, >, ", and '. * * $quote_style can be set to ENT_COMPAT to encode " to * ", or ENT_QUOTES to do both. Default is ENT_NOQUOTES where no quotes are encoded. * * @since 1.2.2 * * @param string $string The text which is to be encoded. * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES. * @param string $charset Optional. The character encoding of the string. Default is false. * @param boolean $double_encode Optional. Whether to encode existing html entities. Default is false. * @return string The encoded text with HTML entities. */ function _wp_specialchars( $string, $quote_style = ENT_NOQUOTES, $charset = false, $double_encode = false ) { $string = (string) $string; if ( 0 === strlen( $string ) ) return ''; // Don't bother if there are no specialchars - saves some processing if ( ! preg_match( '/[&<>"\']/', $string ) ) return $string; // Account for the previous behaviour of the function when the $quote_style is not an accepted value if ( empty( $quote_style ) ) $quote_style = ENT_NOQUOTES; elseif ( ! in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) $quote_style = ENT_QUOTES; // Store the site charset as a static to avoid multiple calls to wp_load_alloptions() if ( ! $charset ) { static $_charset; if ( ! isset( $_charset ) ) { $alloptions = wp_load_alloptions(); $_charset = isset( $alloptions['blog_charset'] ) ? $alloptions['blog_charset'] : ''; } $charset = $_charset; } if ( in_array( $charset, array( 'utf8', 'utf-8', 'UTF8' ) ) ) $charset = 'UTF-8'; $_quote_style = $quote_style; if ( $quote_style === 'double' ) { $quote_style = ENT_COMPAT; $_quote_style = ENT_COMPAT; } elseif ( $quote_style === 'single' ) { $quote_style = ENT_NOQUOTES; } // Handle double encoding ourselves if ( $double_encode ) { $string = @htmlspecialchars( $string, $quote_style, $charset ); } else { // Decode & into & $string = wp_specialchars_decode( $string, $_quote_style ); // Guarantee every &entity; is valid or re-encode the & $string = wp_kses_normalize_entities( $string ); // Now re-encode everything except &entity; $string = preg_split( '/(&#?x?[0-9a-z]+;)/i', $string, -1, PREG_SPLIT_DELIM_CAPTURE ); for ( $i = 0; $i < count( $string ); $i += 2 ) $string[$i] = @htmlspecialchars( $string[$i], $quote_style, $charset ); $string = implode( '', $string ); } // Backwards compatibility if ( 'single' === $_quote_style ) $string = str_replace( "'", ''', $string ); return $string; } /** * Converts a number of HTML entities into their special characters. * * Specifically deals with: &, <, >, ", and '. * * $quote_style can be set to ENT_COMPAT to decode " entities, * or ENT_QUOTES to do both " and '. Default is ENT_NOQUOTES where no quotes are decoded. * * @since 2.8 * * @param string $string The text which is to be decoded. * @param mixed $quote_style Optional. Converts double quotes if set to ENT_COMPAT, both single and double if set to ENT_QUOTES or none if set to ENT_NOQUOTES. Also compatible with old _wp_specialchars() values; converting single quotes if set to 'single', double if set to 'double' or both if otherwise set. Default is ENT_NOQUOTES. * @return string The decoded text without HTML entities. */ function wp_specialchars_decode( $string, $quote_style = ENT_NOQUOTES ) { $string = (string) $string; if ( 0 === strlen( $string ) ) { return ''; } // Don't bother if there are no entities - saves a lot of processing if ( strpos( $string, '&' ) === false ) { return $string; } // Match the previous behaviour of _wp_specialchars() when the $quote_style is not an accepted value if ( empty( $quote_style ) ) { $quote_style = ENT_NOQUOTES; } elseif ( !in_array( $quote_style, array( 0, 2, 3, 'single', 'double' ), true ) ) { $quote_style = ENT_QUOTES; } // More complete than get_html_translation_table( HTML_SPECIALCHARS ) $single = array( ''' => '\'', ''' => '\'' ); $single_preg = array( '/�*39;/' => ''', '/�*27;/i' => ''' ); $double = array( '"' => '"', '"' => '"', '"' => '"' ); $double_preg = array( '/�*34;/' => '"', '/�*22;/i' => '"' ); $others = array( '<' => '<', '<' => '<', '>' => '>', '>' => '>', '&' => '&', '&' => '&', '&' => '&' ); $others_preg = array( '/�*60;/' => '<', '/�*62;/' => '>', '/�*38;/' => '&', '/�*26;/i' => '&' ); if ( $quote_style === ENT_QUOTES ) { $translation = array_merge( $single, $double, $others ); $translation_preg = array_merge( $single_preg, $double_preg, $others_preg ); } elseif ( $quote_style === ENT_COMPAT || $quote_style === 'double' ) { $translation = array_merge( $double, $others ); $translation_preg = array_merge( $double_preg, $others_preg ); } elseif ( $quote_style === 'single' ) { $translation = array_merge( $single, $others ); $translation_preg = array_merge( $single_preg, $others_preg ); } elseif ( $quote_style === ENT_NOQUOTES ) { $translation = $others; $translation_preg = $others_preg; } // Remove zero padding on numeric entities $string = preg_replace( array_keys( $translation_preg ), array_values( $translation_preg ), $string ); // Replace characters according to translation table return strtr( $string, $translation ); } /** * Checks for invalid UTF8 in a string. * * @since 2.8 * * @param string $string The text which is to be checked. * @param boolean $strip Optional. Whether to attempt to strip out invalid UTF8. Default is false. * @return string The checked text. */ function wp_check_invalid_utf8( $string, $strip = false ) { $string = (string) $string; if ( 0 === strlen( $string ) ) { return ''; } // Store the site charset as a static to avoid multiple calls to get_option() static $is_utf8; if ( !isset( $is_utf8 ) ) { $is_utf8 = in_array( get_option( 'blog_charset' ), array( 'utf8', 'utf-8', 'UTF8', 'UTF-8' ) ); } if ( !$is_utf8 ) { return $string; } // Check for support for utf8 in the installed PCRE library once and store the result in a static static $utf8_pcre; if ( !isset( $utf8_pcre ) ) { $utf8_pcre = @preg_match( '/^./u', 'a' ); } // We can't demand utf8 in the PCRE installation, so just return the string in those cases if ( !$utf8_pcre ) { return $string; } // preg_match fails when it encounters invalid UTF8 in $string if ( 1 === @preg_match( '/^./us', $string ) ) { return $string; } // Attempt to strip the bad chars if requested (not recommended) if ( $strip && function_exists( 'iconv' ) ) { return iconv( 'utf-8', 'utf-8', $string ); } return ''; } /** * Encode the Unicode values to be used in the URI. * * @since 1.5.0 * * @param string $utf8_string * @param int $length Max length of the string * @return string String with Unicode encoded for URI. */ function utf8_uri_encode( $utf8_string, $length = 0 ) { $unicode = ''; $values = array(); $num_octets = 1; $unicode_length = 0; $string_length = strlen( $utf8_string ); for ($i = 0; $i < $string_length; $i++ ) { $value = ord( $utf8_string[ $i ] ); if ( $value < 128 ) { if ( $length && ( $unicode_length >= $length ) ) break; $unicode .= chr($value); $unicode_length++; } else { if ( count( $values ) == 0 ) $num_octets = ( $value < 224 ) ? 2 : 3; $values[] = $value; if ( $length && ( $unicode_length + ($num_octets * 3) ) > $length ) break; if ( count( $values ) == $num_octets ) { if ($num_octets == 3) { $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]) . '%' . dechex($values[2]); $unicode_length += 9; } else { $unicode .= '%' . dechex($values[0]) . '%' . dechex($values[1]); $unicode_length += 6; } $values = array(); $num_octets = 1; } } } return $unicode; } /** * Converts all accent characters to ASCII characters. * * If there are no accent characters, then the string given is just returned. * * @since 1.2.1 * * @param string $string Text that might have accent characters * @return string Filtered string with replaced "nice" characters. */ function remove_accents($string) { if ( !preg_match('/[\x80-\xff]/', $string) ) return $string; if (seems_utf8($string)) { $chars = array( // Decompositions for Latin-1 Supplement chr(194).chr(170) => 'a', chr(194).chr(186) => 'o', chr(195).chr(128) => 'A', chr(195).chr(129) => 'A', chr(195).chr(130) => 'A', chr(195).chr(131) => 'A', chr(195).chr(132) => 'A', chr(195).chr(133) => 'A', chr(195).chr(134) => 'AE',chr(195).chr(135) => 'C', chr(195).chr(136) => 'E', chr(195).chr(137) => 'E', chr(195).chr(138) => 'E', chr(195).chr(139) => 'E', chr(195).chr(140) => 'I', chr(195).chr(141) => 'I', chr(195).chr(142) => 'I', chr(195).chr(143) => 'I', chr(195).chr(144) => 'D', chr(195).chr(145) => 'N', chr(195).chr(146) => 'O', chr(195).chr(147) => 'O', chr(195).chr(148) => 'O', chr(195).chr(149) => 'O', chr(195).chr(150) => 'O', chr(195).chr(153) => 'U', chr(195).chr(154) => 'U', chr(195).chr(155) => 'U', chr(195).chr(156) => 'U', chr(195).chr(157) => 'Y', chr(195).chr(158) => 'TH',chr(195).chr(159) => 's', chr(195).chr(160) => 'a', chr(195).chr(161) => 'a', chr(195).chr(162) => 'a', chr(195).chr(163) => 'a', chr(195).chr(164) => 'a', chr(195).chr(165) => 'a', chr(195).chr(166) => 'ae',chr(195).chr(167) => 'c', chr(195).chr(168) => 'e', chr(195).chr(169) => 'e', chr(195).chr(170) => 'e', chr(195).chr(171) => 'e', chr(195).chr(172) => 'i', chr(195).chr(173) => 'i', chr(195).chr(174) => 'i', chr(195).chr(175) => 'i', chr(195).chr(176) => 'd', chr(195).chr(177) => 'n', chr(195).chr(178) => 'o', chr(195).chr(179) => 'o', chr(195).chr(180) => 'o', chr(195).chr(181) => 'o', chr(195).chr(182) => 'o', chr(195).chr(184) => 'o', chr(195).chr(185) => 'u', chr(195).chr(186) => 'u', chr(195).chr(187) => 'u', chr(195).chr(188) => 'u', chr(195).chr(189) => 'y', chr(195).chr(190) => 'th', chr(195).chr(191) => 'y', chr(195).chr(152) => 'O', // Decompositions for Latin Extended-A chr(196).chr(128) => 'A', chr(196).chr(129) => 'a', chr(196).chr(130) => 'A', chr(196).chr(131) => 'a', chr(196).chr(132) => 'A', chr(196).chr(133) => 'a', chr(196).chr(134) => 'C', chr(196).chr(135) => 'c', chr(196).chr(136) => 'C', chr(196).chr(137) => 'c', chr(196).chr(138) => 'C', chr(196).chr(139) => 'c', chr(196).chr(140) => 'C', chr(196).chr(141) => 'c', chr(196).chr(142) => 'D', chr(196).chr(143) => 'd', chr(196).chr(144) => 'D', chr(196).chr(145) => 'd', chr(196).chr(146) => 'E', chr(196).chr(147) => 'e', chr(196).chr(148) => 'E', chr(196).chr(149) => 'e', chr(196).chr(150) => 'E', chr(196).chr(151) => 'e', chr(196).chr(152) => 'E', chr(196).chr(153) => 'e', chr(196).chr(154) => 'E', chr(196).chr(155) => 'e', chr(196).chr(156) => 'G', chr(196).chr(157) => 'g', chr(196).chr(158) => 'G', chr(196).chr(159) => 'g', chr(196).chr(160) => 'G', chr(196).chr(161) => 'g', chr(196).chr(162) => 'G', chr(196).chr(163) => 'g', chr(196).chr(164) => 'H', chr(196).chr(165) => 'h', chr(196).chr(166) => 'H', chr(196).chr(167) => 'h', chr(196).chr(168) => 'I', chr(196).chr(169) => 'i', chr(196).chr(170) => 'I', chr(196).chr(171) => 'i', chr(196).chr(172) => 'I', chr(196).chr(173) => 'i', chr(196).chr(174) => 'I', chr(196).chr(175) => 'i', chr(196).chr(176) => 'I', chr(196).chr(177) => 'i', chr(196).chr(178) => 'IJ',chr(196).chr(179) => 'ij', chr(196).chr(180) => 'J', chr(196).chr(181) => 'j', chr(196).chr(182) => 'K', chr(196).chr(183) => 'k', chr(196).chr(184) => 'k', chr(196).chr(185) => 'L', chr(196).chr(186) => 'l', chr(196).chr(187) => 'L', chr(196).chr(188) => 'l', chr(196).chr(189) => 'L', chr(196).chr(190) => 'l', chr(196).chr(191) => 'L', chr(197).chr(128) => 'l', chr(197).chr(129) => 'L', chr(197).chr(130) => 'l', chr(197).chr(131) => 'N', chr(197).chr(132) => 'n', chr(197).chr(133) => 'N', chr(197).chr(134) => 'n', chr(197).chr(135) => 'N', chr(197).chr(136) => 'n', chr(197).chr(137) => 'N', chr(197).chr(138) => 'n', chr(197).chr(139) => 'N', chr(197).chr(140) => 'O', chr(197).chr(141) => 'o', chr(197).chr(142) => 'O', chr(197).chr(143) => 'o', chr(197).chr(144) => 'O', chr(197).chr(145) => 'o', chr(197).chr(146) => 'OE',chr(197).chr(147) => 'oe', chr(197).chr(148) => 'R',chr(197).chr(149) => 'r', chr(197).chr(150) => 'R',chr(197).chr(151) => 'r', chr(197).chr(152) => 'R',chr(197).chr(153) => 'r', chr(197).chr(154) => 'S',chr(197).chr(155) => 's', chr(197).chr(156) => 'S',chr(197).chr(157) => 's', chr(197).chr(158) => 'S',chr(197).chr(159) => 's', chr(197).chr(160) => 'S', chr(197).chr(161) => 's', chr(197).chr(162) => 'T', chr(197).chr(163) => 't', chr(197).chr(164) => 'T', chr(197).chr(165) => 't', chr(197).chr(166) => 'T', chr(197).chr(167) => 't', chr(197).chr(168) => 'U', chr(197).chr(169) => 'u', chr(197).chr(170) => 'U', chr(197).chr(171) => 'u', chr(197).chr(172) => 'U', chr(197).chr(173) => 'u', chr(197).chr(174) => 'U', chr(197).chr(175) => 'u', chr(197).chr(176) => 'U', chr(197).chr(177) => 'u', chr(197).chr(178) => 'U', chr(197).chr(179) => 'u', chr(197).chr(180) => 'W', chr(197).chr(181) => 'w', chr(197).chr(182) => 'Y', chr(197).chr(183) => 'y', chr(197).chr(184) => 'Y', chr(197).chr(185) => 'Z', chr(197).chr(186) => 'z', chr(197).chr(187) => 'Z', chr(197).chr(188) => 'z', chr(197).chr(189) => 'Z', chr(197).chr(190) => 'z', chr(197).chr(191) => 's', // Decompositions for Latin Extended-B chr(200).chr(152) => 'S', chr(200).chr(153) => 's', chr(200).chr(154) => 'T', chr(200).chr(155) => 't', // Euro Sign chr(226).chr(130).chr(172) => 'E', // GBP (Pound) Sign chr(194).chr(163) => '', // Vowels with diacritic (Vietnamese) // unmarked chr(198).chr(160) => 'O', chr(198).chr(161) => 'o', chr(198).chr(175) => 'U', chr(198).chr(176) => 'u', // grave accent chr(225).chr(186).chr(166) => 'A', chr(225).chr(186).chr(167) => 'a', chr(225).chr(186).chr(176) => 'A', chr(225).chr(186).chr(177) => 'a', chr(225).chr(187).chr(128) => 'E', chr(225).chr(187).chr(129) => 'e', chr(225).chr(187).chr(146) => 'O', chr(225).chr(187).chr(147) => 'o', chr(225).chr(187).chr(156) => 'O', chr(225).chr(187).chr(157) => 'o', chr(225).chr(187).chr(170) => 'U', chr(225).chr(187).chr(171) => 'u', chr(225).chr(187).chr(178) => 'Y', chr(225).chr(187).chr(179) => 'y', // hook chr(225).chr(186).chr(162) => 'A', chr(225).chr(186).chr(163) => 'a', chr(225).chr(186).chr(168) => 'A', chr(225).chr(186).chr(169) => 'a', chr(225).chr(186).chr(178) => 'A', chr(225).chr(186).chr(179) => 'a', chr(225).chr(186).chr(186) => 'E', chr(225).chr(186).chr(187) => 'e', chr(225).chr(187).chr(130) => 'E', chr(225).chr(187).chr(131) => 'e', chr(225).chr(187).chr(136) => 'I', chr(225).chr(187).chr(137) => 'i', chr(225).chr(187).chr(142) => 'O', chr(225).chr(187).chr(143) => 'o', chr(225).chr(187).chr(148) => 'O', chr(225).chr(187).chr(149) => 'o', chr(225).chr(187).chr(158) => 'O', chr(225).chr(187).chr(159) => 'o', chr(225).chr(187).chr(166) => 'U', chr(225).chr(187).chr(167) => 'u', chr(225).chr(187).chr(172) => 'U', chr(225).chr(187).chr(173) => 'u', chr(225).chr(187).chr(182) => 'Y', chr(225).chr(187).chr(183) => 'y', // tilde chr(225).chr(186).chr(170) => 'A', chr(225).chr(186).chr(171) => 'a', chr(225).chr(186).chr(180) => 'A', chr(225).chr(186).chr(181) => 'a', chr(225).chr(186).chr(188) => 'E', chr(225).chr(186).chr(189) => 'e', chr(225).chr(187).chr(132) => 'E', chr(225).chr(187).chr(133) => 'e', chr(225).chr(187).chr(150) => 'O', chr(225).chr(187).chr(151) => 'o', chr(225).chr(187).chr(160) => 'O', chr(225).chr(187).chr(161) => 'o', chr(225).chr(187).chr(174) => 'U', chr(225).chr(187).chr(175) => 'u', chr(225).chr(187).chr(184) => 'Y', chr(225).chr(187).chr(185) => 'y', // acute accent chr(225).chr(186).chr(164) => 'A', chr(225).chr(186).chr(165) => 'a', chr(225).chr(186).chr(174) => 'A', chr(225).chr(186).chr(175) => 'a', chr(225).chr(186).chr(190) => 'E', chr(225).chr(186).chr(191) => 'e', chr(225).chr(187).chr(144) => 'O', chr(225).chr(187).chr(145) => 'o', chr(225).chr(187).chr(154) => 'O', chr(225).chr(187).chr(155) => 'o', chr(225).chr(187).chr(168) => 'U', chr(225).chr(187).chr(169) => 'u', // dot below chr(225).chr(186).chr(160) => 'A', chr(225).chr(186).chr(161) => 'a', chr(225).chr(186).chr(172) => 'A', chr(225).chr(186).chr(173) => 'a', chr(225).chr(186).chr(182) => 'A', chr(225).chr(186).chr(183) => 'a', chr(225).chr(186).chr(184) => 'E', chr(225).chr(186).chr(185) => 'e', chr(225).chr(187).chr(134) => 'E', chr(225).chr(187).chr(135) => 'e', chr(225).chr(187).chr(138) => 'I', chr(225).chr(187).chr(139) => 'i', chr(225).chr(187).chr(140) => 'O', chr(225).chr(187).chr(141) => 'o', chr(225).chr(187).chr(152) => 'O', chr(225).chr(187).chr(153) => 'o', chr(225).chr(187).chr(162) => 'O', chr(225).chr(187).chr(163) => 'o', chr(225).chr(187).chr(164) => 'U', chr(225).chr(187).chr(165) => 'u', chr(225).chr(187).chr(176) => 'U', chr(225).chr(187).chr(177) => 'u', chr(225).chr(187).chr(180) => 'Y', chr(225).chr(187).chr(181) => 'y', ); $string = strtr($string, $chars); } else { // Assume ISO-8859-1 if not UTF-8 $chars['in'] = chr(128).chr(131).chr(138).chr(142).chr(154).chr(158) .chr(159).chr(162).chr(165).chr(181).chr(192).chr(193).chr(194) .chr(195).chr(196).chr(197).chr(199).chr(200).chr(201).chr(202) .chr(203).chr(204).chr(205).chr(206).chr(207).chr(209).chr(210) .chr(211).chr(212).chr(213).chr(214).chr(216).chr(217).chr(218) .chr(219).chr(220).chr(221).chr(224).chr(225).chr(226).chr(227) .chr(228).chr(229).chr(231).chr(232).chr(233).chr(234).chr(235) .chr(236).chr(237).chr(238).chr(239).chr(241).chr(242).chr(243) .chr(244).chr(245).chr(246).chr(248).chr(249).chr(250).chr(251) .chr(252).chr(253).chr(255); $chars['out'] = "EfSZszYcYuAAAAAACEEEEIIIINOOOOOOUUUUYaaaaaaceeeeiiiinoooooouuuuyy"; $string = strtr($string, $chars['in'], $chars['out']); $double_chars['in'] = array(chr(140), chr(156), chr(198), chr(208), chr(222), chr(223), chr(230), chr(240), chr(254)); $double_chars['out'] = array('OE', 'oe', 'AE', 'DH', 'TH', 'ss', 'ae', 'dh', 'th'); $string = str_replace($double_chars['in'], $double_chars['out'], $string); } return $string; } /** * Sanitizes a filename replacing whitespace with dashes * * Removes special characters that are illegal in filenames on certain * operating systems and special characters requiring special escaping * to manipulate at the command line. Replaces spaces and consecutive * dashes with a single dash. Trim period, dash and underscore from beginning * and end of filename. * * @since 2.1.0 * * @param string $filename The filename to be sanitized * @return string The sanitized filename */ function sanitize_file_name( $filename ) { $filename_raw = $filename; $special_chars = array("?", "[", "]", "/", "\\", "=", "<", ">", ":", ";", ",", "'", "\"", "&", "$", "#", "*", "(", ")", "|", "~", "`", "!", "{", "}", chr(0)); $special_chars = apply_filters('sanitize_file_name_chars', $special_chars, $filename_raw); $filename = str_replace($special_chars, '', $filename); $filename = preg_replace('/[\s-]+/', '-', $filename); $filename = trim($filename, '.-_'); // Split the filename into a base and extension[s] $parts = explode('.', $filename); // Return if only one extension if ( count($parts) <= 2 ) return apply_filters('sanitize_file_name', $filename, $filename_raw); // Process multiple extensions $filename = array_shift($parts); $extension = array_pop($parts); $mimes = get_allowed_mime_types(); // Loop over any intermediate extensions. Munge them with a trailing underscore if they are a 2 - 5 character // long alpha string not in the extension whitelist. foreach ( (array) $parts as $part) { $filename .= '.' . $part; if ( preg_match("/^[a-zA-Z]{2,5}\d?$/", $part) ) { $allowed = false; foreach ( $mimes as $ext_preg => $mime_match ) { $ext_preg = '!^(' . $ext_preg . ')$!i'; if ( preg_match( $ext_preg, $part ) ) { $allowed = true; break; } } if ( !$allowed ) $filename .= '_'; } } $filename .= '.' . $extension; return apply_filters('sanitize_file_name', $filename, $filename_raw); } /** * Sanitize username stripping out unsafe characters. * * Removes tags, octets, entities, and if strict is enabled, will only keep * alphanumeric, _, space, ., -, @. After sanitizing, it passes the username, * raw username (the username in the parameter), and the value of $strict as * parameters for the 'sanitize_user' filter. * * @since 2.0.0 * @uses apply_filters() Calls 'sanitize_user' hook on username, raw username, * and $strict parameter. * * @param string $username The username to be sanitized. * @param bool $strict If set limits $username to specific characters. Default false. * @return string The sanitized username, after passing through filters. */ function sanitize_user( $username, $strict = false ) { $raw_username = $username; $username = wp_strip_all_tags( $username ); $username = remove_accents( $username ); // Kill octets $username = preg_replace( '|%([a-fA-F0-9][a-fA-F0-9])|', '', $username ); $username = preg_replace( '/&.+?;/', '', $username ); // Kill entities // If strict, reduce to ASCII for max portability. if ( $strict ) $username = preg_replace( '|[^a-z0-9 _.\-@]|i', '', $username ); $username = trim( $username ); // Consolidate contiguous whitespace $username = preg_replace( '|\s+|', ' ', $username ); return apply_filters( 'sanitize_user', $username, $raw_username, $strict ); } /** * Sanitize a string key. * * Keys are used as internal identifiers. Lowercase alphanumeric characters, dashes and underscores are allowed. * * @since 3.0.0 * * @param string $key String key * @return string Sanitized key */ function sanitize_key( $key ) { $raw_key = $key; $key = strtolower( $key ); $key = preg_replace( '/[^a-z0-9_\-]/', '', $key ); return apply_filters( 'sanitize_key', $key, $raw_key ); } /** * Sanitizes title or use fallback title. * * Specifically, HTML and PHP tags are stripped. Further actions can be added * via the plugin API. If $title is empty and $fallback_title is set, the latter * will be used. * * @since 1.0.0 * * @param string $title The string to be sanitized. * @param string $fallback_title Optional. A title to use if $title is empty. * @param string $context Optional. The operation for which the string is sanitized * @return string The sanitized string. */ function sanitize_title($title, $fallback_title = '', $context = 'save') { $raw_title = $title; if ( 'save' == $context ) $title = remove_accents($title); $title = apply_filters('sanitize_title', $title, $raw_title, $context); if ( '' === $title || false === $title ) $title = $fallback_title; return $title; } function sanitize_title_for_query($title) { return sanitize_title($title, '', 'query'); } /** * Sanitizes title, replacing whitespace and a few other characters with dashes. * * Limits the output to alphanumeric characters, underscore (_) and dash (-). * Whitespace becomes a dash. * * @since 1.2.0 * * @param string $title The title to be sanitized. * @param string $raw_title Optional. Not used. * @param string $context Optional. The operation for which the string is sanitized. * @return string The sanitized title. */ function sanitize_title_with_dashes($title, $raw_title = '', $context = 'display') { $title = strip_tags($title); // Preserve escaped octets. $title = preg_replace('|%([a-fA-F0-9][a-fA-F0-9])|', '---$1---', $title); // Remove percent signs that are not part of an octet. $title = str_replace('%', '', $title); // Restore octets. $title = preg_replace('|---([a-fA-F0-9][a-fA-F0-9])---|', '%$1', $title); if (seems_utf8($title)) { if (function_exists('mb_strtolower')) { $title = mb_strtolower($title, 'UTF-8'); } $title = utf8_uri_encode($title, 200); } $title = strtolower($title); $title = preg_replace('/&.+?;/', '', $title); // kill entities $title = str_replace('.', '-', $title); if ( 'save' == $context ) { // Convert nbsp, ndash and mdash to hyphens $title = str_replace( array( '%c2%a0', '%e2%80%93', '%e2%80%94' ), '-', $title ); // Strip these characters entirely $title = str_replace( array( // iexcl and iquest '%c2%a1', '%c2%bf', // angle quotes '%c2%ab', '%c2%bb', '%e2%80%b9', '%e2%80%ba', // curly quotes '%e2%80%98', '%e2%80%99', '%e2%80%9c', '%e2%80%9d', '%e2%80%9a', '%e2%80%9b', '%e2%80%9e', '%e2%80%9f', // copy, reg, deg, hellip and trade '%c2%a9', '%c2%ae', '%c2%b0', '%e2%80%a6', '%e2%84%a2', ), '', $title ); // Convert times to x $title = str_replace( '%c3%97', 'x', $title ); } $title = preg_replace('/[^%a-z0-9 _-]/', '', $title); $title = preg_replace('/\s+/', '-', $title); $title = preg_replace('|-+|', '-', $title); $title = trim($title, '-'); return $title; } /** * Ensures a string is a valid SQL order by clause. * * Accepts one or more columns, with or without ASC/DESC, and also accepts * RAND(). * * @since 2.5.1 * * @param string $orderby Order by string to be checked. * @return string|false Returns the order by clause if it is a match, false otherwise. */ function sanitize_sql_orderby( $orderby ){ preg_match('/^\s*([a-z0-9_]+(\s+(ASC|DESC))?(\s*,\s*|\s*$))+|^\s*RAND\(\s*\)\s*$/i', $orderby, $obmatches); if ( !$obmatches ) return false; return $orderby; } /** * Santizes a html classname to ensure it only contains valid characters * * Strips the string down to A-Z,a-z,0-9,_,-. If this results in an empty * string then it will return the alternative value supplied. * * @todo Expand to support the full range of CDATA that a class attribute can contain. * * @since 2.8.0 * * @param string $class The classname to be sanitized * @param string $fallback Optional. The value to return if the sanitization end's up as an empty string. * Defaults to an empty string. * @return string The sanitized value */ function sanitize_html_class( $class, $fallback = '' ) { //Strip out any % encoded octets $sanitized = preg_replace( '|%[a-fA-F0-9][a-fA-F0-9]|', '', $class ); //Limit to A-Z,a-z,0-9,_,- $sanitized = preg_replace( '/[^A-Za-z0-9_-]/', '', $sanitized ); if ( '' == $sanitized ) $sanitized = $fallback; return apply_filters( 'sanitize_html_class', $sanitized, $class, $fallback ); } /** * Converts a number of characters from a string. * * Metadata tags <<title>> and <<category>> are removed, <<br>> and <<hr>> are * converted into correct XHTML and Unicode characters are converted to the * valid range. * * @since 0.71 * * @param string $content String of characters to be converted. * @param string $deprecated Not used. * @return string Converted string. */ function convert_chars($content, $deprecated = '') { if ( !empty( $deprecated ) ) _deprecated_argument( __FUNCTION__, '0.71' ); // Translation of invalid Unicode references range to valid range $wp_htmltranswinuni = array( '€' => '€', // the Euro sign '' => '', '‚' => '‚', // these are Windows CP1252 specific characters 'ƒ' => 'ƒ', // they would look weird on non-Windows browsers '„' => '„', '…' => '…', '†' => '†', '‡' => '‡', 'ˆ' => 'ˆ', '‰' => '‰', 'Š' => 'Š', '‹' => '‹', 'Œ' => 'Œ', '' => '', 'Ž' => 'Ž', '' => '', '' => '', '‘' => '‘', '’' => '’', '“' => '“', '”' => '”', '•' => '•', '–' => '–', '—' => '—', '˜' => '˜', '™' => '™', 'š' => 'š', '›' => '›', 'œ' => 'œ', '' => '', 'ž' => 'ž', 'Ÿ' => 'Ÿ' ); // Remove metadata tags $content = preg_replace('/<title>(.+?)<\/title>/','',$content); $content = preg_replace('/<category>(.+?)<\/category>/','',$content); // Converts lone & characters into & (a.k.a. &) $content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&$1', $content); // Fix Word pasting $content = strtr($content, $wp_htmltranswinuni); // Just a little XHTML help $content = str_replace('<br>', '<br />', $content); $content = str_replace('<hr>', '<hr />', $content); return $content; } /** * Will only balance the tags if forced to and the option is set to balance tags. * * The option 'use_balanceTags' is used to determine whether the tags will be balanced. * * @since 0.71 * * @param string $text Text to be balanced * @param bool $force If true, forces balancing, ignoring the value of the option. Default false. * @return string Balanced text */ function balanceTags( $text, $force = false ) { if ( !$force && get_option('use_balanceTags') == 0 ) return $text; return force_balance_tags( $text ); } /** * Balances tags of string using a modified stack. * * @since 2.0.4 * * @author Leonard Lin <leonard@acm.org> * @license GPL * @copyright November 4, 2001 * @version 1.1 * @todo Make better - change loop condition to $text in 1.2 * @internal Modified by Scott Reilly (coffee2code) 02 Aug 2004 * 1.1 Fixed handling of append/stack pop order of end text * Added Cleaning Hooks * 1.0 First Version * * @param string $text Text to be balanced. * @return string Balanced text. */ function force_balance_tags( $text ) { $tagstack = array(); $stacksize = 0; $tagqueue = ''; $newtext = ''; $single_tags = array( 'br', 'hr', 'img', 'input' ); // Known single-entity/self-closing tags $nestable_tags = array( 'blockquote', 'div', 'span', 'q' ); // Tags that can be immediately nested within themselves // WP bug fix for comments - in case you REALLY meant to type '< !--' $text = str_replace('< !--', '< !--', $text); // WP bug fix for LOVE <3 (and other situations with '<' before a number) $text = preg_replace('#<([0-9]{1})#', '<$1', $text); while ( preg_match("/<(\/?[\w:]*)\s*([^>]*)>/", $text, $regex) ) { $newtext .= $tagqueue; $i = strpos($text, $regex[0]); $l = strlen($regex[0]); // clear the shifter $tagqueue = ''; // Pop or Push if ( isset($regex[1][0]) && '/' == $regex[1][0] ) { // End Tag $tag = strtolower(substr($regex[1],1)); // if too many closing tags if( $stacksize <= 0 ) { $tag = ''; // or close to be safe $tag = '/' . $tag; } // if stacktop value = tag close value then pop else if ( $tagstack[$stacksize - 1] == $tag ) { // found closing tag $tag = '</' . $tag . '>'; // Close Tag // Pop array_pop( $tagstack ); $stacksize--; } else { // closing tag not at top, search for it for ( $j = $stacksize-1; $j >= 0; $j-- ) { if ( $tagstack[$j] == $tag ) { // add tag to tagqueue for ( $k = $stacksize-1; $k >= $j; $k--) { $tagqueue .= '</' . array_pop( $tagstack ) . '>'; $stacksize--; } break; } } $tag = ''; } } else { // Begin Tag $tag = strtolower($regex[1]); // Tag Cleaning // If self-closing or '', don't do anything. if ( substr($regex[2],-1) == '/' || $tag == '' ) { // do nothing } // ElseIf it's a known single-entity tag but it doesn't close itself, do so elseif ( in_array($tag, $single_tags) ) { $regex[2] .= '/'; } else { // Push the tag onto the stack // If the top of the stack is the same as the tag we want to push, close previous tag if ( $stacksize > 0 && !in_array($tag, $nestable_tags) && $tagstack[$stacksize - 1] == $tag ) { $tagqueue = '</' . array_pop ($tagstack) . '>'; $stacksize--; } $stacksize = array_push ($tagstack, $tag); } // Attributes $attributes = $regex[2]; if( !empty($attributes) ) $attributes = ' '.$attributes; $tag = '<' . $tag . $attributes . '>'; //If already queuing a close tag, then put this tag on, too if ( !empty($tagqueue) ) { $tagqueue .= $tag; $tag = ''; } } $newtext .= substr($text, 0, $i) . $tag; $text = substr($text, $i + $l); } // Clear Tag Queue $newtext .= $tagqueue; // Add Remaining text $newtext .= $text; // Empty Stack while( $x = array_pop($tagstack) ) $newtext .= '</' . $x . '>'; // Add remaining tags to close // WP fix for the bug with HTML comments $newtext = str_replace("< !--","<!--",$newtext); $newtext = str_replace("< !--","< !--",$newtext); return $newtext; } /** * Acts on text which is about to be edited. * * The $content is run through esc_textarea(), which uses htmlspecialchars() * to convert special characters to HTML entities. If $richedit is set to true, * it is simply a holder for the 'format_to_edit' filter. * * @since 0.71 * * @param string $content The text about to be edited. * @param bool $richedit Whether the $content should not pass through htmlspecialchars(). Default false (meaning it will be passed). * @return string The text after the filter (and possibly htmlspecialchars()) has been run. */ function format_to_edit( $content, $richedit = false ) { $content = apply_filters( 'format_to_edit', $content ); if ( ! $richedit ) $content = esc_textarea( $content ); return $content; } /** * Holder for the 'format_to_post' filter. * * @since 0.71 * * @param string $content The text to pass through the filter. * @return string Text returned from the 'format_to_post' filter. */ function format_to_post($content) { $content = apply_filters('format_to_post', $content); return $content; } /** * Add leading zeros when necessary. * * If you set the threshold to '4' and the number is '10', then you will get * back '0010'. If you set the threshold to '4' and the number is '5000', then you * will get back '5000'. * * Uses sprintf to append the amount of zeros based on the $threshold parameter * and the size of the number. If the number is large enough, then no zeros will * be appended. * * @since 0.71 * * @param mixed $number Number to append zeros to if not greater than threshold. * @param int $threshold Digit places number needs to be to not have zeros added. * @return string Adds leading zeros to number if needed. */ function zeroise($number, $threshold) { return sprintf('%0'.$threshold.'s', $number); } /** * Adds backslashes before letters and before a number at the start of a string. * * @since 0.71 * * @param string $string Value to which backslashes will be added. * @return string String with backslashes inserted. */ function backslashit($string) { $string = preg_replace('/^([0-9])/', '\\\\\\\\\1', $string); $string = preg_replace('/([a-z])/i', '\\\\\1', $string); return $string; } /** * Appends a trailing slash. * * Will remove trailing slash if it exists already before adding a trailing * slash. This prevents double slashing a string or path. * * The primary use of this is for paths and thus should be used for paths. It is * not restricted to paths and offers no specific path support. * * @since 1.2.0 * @uses untrailingslashit() Unslashes string if it was slashed already. * * @param string $string What to add the trailing slash to. * @return string String with trailing slash added. */ function trailingslashit($string) { return untrailingslashit($string) . '/'; } /** * Removes trailing slash if it exists. * * The primary use of this is for paths and thus should be used for paths. It is * not restricted to paths and offers no specific path support. * * @since 2.2.0 * * @param string $string What to remove the trailing slash from. * @return string String without the trailing slash. */ function untrailingslashit($string) { return rtrim($string, '/'); } /** * Adds slashes to escape strings. * * Slashes will first be removed if magic_quotes_gpc is set, see {@link * http://www.php.net/magic_quotes} for more details. * * @since 0.71 * * @param string $gpc The string returned from HTTP request data. * @return string Returns a string escaped with slashes. */ function addslashes_gpc($gpc) { if ( get_magic_quotes_gpc() ) $gpc = stripslashes($gpc); return esc_sql($gpc); } /** * Navigates through an array and removes slashes from the values. * * If an array is passed, the array_map() function causes a callback to pass the * value back to the function. The slashes from this value will removed. * * @since 2.0.0 * * @param array|string $value The array or string to be stripped. * @return array|string Stripped array (or string in the callback). */ function stripslashes_deep($value) { if ( is_array($value) ) { $value = array_map('stripslashes_deep', $value); } elseif ( is_object($value) ) { $vars = get_object_vars( $value ); foreach ($vars as $key=>$data) { $value->{$key} = stripslashes_deep( $data ); } } else { $value = stripslashes($value); } return $value; } /** * Navigates through an array and encodes the values to be used in a URL. * * * @since 2.2.0 * * @param array|string $value The array or string to be encoded. * @return array|string $value The encoded array (or string from the callback). */ function urlencode_deep($value) { $value = is_array($value) ? array_map('urlencode_deep', $value) : urlencode($value); return $value; } /** * Navigates through an array and raw encodes the values to be used in a URL. * * @since 3.4.0 * * @param array|string $value The array or string to be encoded. * @return array|string $value The encoded array (or string from the callback). */ function rawurlencode_deep( $value ) { return is_array( $value ) ? array_map( 'rawurlencode_deep', $value ) : rawurlencode( $value ); } /** * Converts email addresses characters to HTML entities to block spam bots. * * @since 0.71 * * @param string $emailaddy Email address. * @param int $mailto Optional. Range from 0 to 1. Used for encoding. * @return string Converted email address. */ function antispambot($emailaddy, $mailto=0) { $emailNOSPAMaddy = ''; srand ((float) microtime() * 1000000); for ($i = 0; $i < strlen($emailaddy); $i = $i + 1) { $j = floor(rand(0, 1+$mailto)); if ($j==0) { $emailNOSPAMaddy .= '&#'.ord(substr($emailaddy,$i,1)).';'; } elseif ($j==1) { $emailNOSPAMaddy .= substr($emailaddy,$i,1); } elseif ($j==2) { $emailNOSPAMaddy .= '%'.zeroise(dechex(ord(substr($emailaddy, $i, 1))), 2); } } $emailNOSPAMaddy = str_replace('@','@',$emailNOSPAMaddy); return $emailNOSPAMaddy; } /** * Callback to convert URI match to HTML A element. * * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link * make_clickable()}. * * @since 2.3.2 * @access private * * @param array $matches Single Regex Match. * @return string HTML A element with URI address. */ function _make_url_clickable_cb($matches) { $url = $matches[2]; if ( ')' == $matches[3] && strpos( $url, '(' ) ) { // If the trailing character is a closing parethesis, and the URL has an opening parenthesis in it, add the closing parenthesis to the URL. // Then we can let the parenthesis balancer do its thing below. $url .= $matches[3]; $suffix = ''; } else { $suffix = $matches[3]; } // Include parentheses in the URL only if paired while ( substr_count( $url, '(' ) < substr_count( $url, ')' ) ) { $suffix = strrchr( $url, ')' ) . $suffix; $url = substr( $url, 0, strrpos( $url, ')' ) ); } $url = esc_url($url); if ( empty($url) ) return $matches[0]; return $matches[1] . "<a href=\"$url\" rel=\"nofollow\">$url</a>" . $suffix; } /** * Callback to convert URL match to HTML A element. * * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link * make_clickable()}. * * @since 2.3.2 * @access private * * @param array $matches Single Regex Match. * @return string HTML A element with URL address. */ function _make_web_ftp_clickable_cb($matches) { $ret = ''; $dest = $matches[2]; $dest = 'http://' . $dest; $dest = esc_url($dest); if ( empty($dest) ) return $matches[0]; // removed trailing [.,;:)] from URL if ( in_array( substr($dest, -1), array('.', ',', ';', ':', ')') ) === true ) { $ret = substr($dest, -1); $dest = substr($dest, 0, strlen($dest)-1); } return $matches[1] . "<a href=\"$dest\" rel=\"nofollow\">$dest</a>$ret"; } /** * Callback to convert email address match to HTML A element. * * This function was backported from 2.5.0 to 2.3.2. Regex callback for {@link * make_clickable()}. * * @since 2.3.2 * @access private * * @param array $matches Single Regex Match. * @return string HTML A element with email address. */ function _make_email_clickable_cb($matches) { $email = $matches[2] . '@' . $matches[3]; return $matches[1] . "<a href=\"mailto:$email\">$email</a>"; } /** * Convert plaintext URI to HTML links. * * Converts URI, www and ftp, and email addresses. Finishes by fixing links * within links. * * @since 0.71 * * @param string $text Content to convert URIs. * @return string Content with converted URIs. */ function make_clickable( $text ) { $r = ''; $textarr = preg_split( '/(<[^<>]+>)/', $text, -1, PREG_SPLIT_DELIM_CAPTURE ); // split out HTML tags foreach ( $textarr as $piece ) { if ( empty( $piece ) || ( $piece[0] == '<' && ! preg_match('|^<\s*[\w]{1,20}+://|', $piece) ) ) { $r .= $piece; continue; } // Long strings might contain expensive edge cases ... if ( 10000 < strlen( $piece ) ) { // ... break it up foreach ( _split_str_by_whitespace( $piece, 2100 ) as $chunk ) { // 2100: Extra room for scheme and leading and trailing paretheses if ( 2101 < strlen( $chunk ) ) { $r .= $chunk; // Too big, no whitespace: bail. } else { $r .= make_clickable( $chunk ); } } } else { $ret = " $piece "; // Pad with whitespace to simplify the regexes $url_clickable = '~ ([\\s(<.,;:!?]) # 1: Leading whitespace, or punctuation ( # 2: URL [\\w]{1,20}+:// # Scheme and hier-part prefix (?=\S{1,2000}\s) # Limit to URLs less than about 2000 characters long [\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]*+ # Non-punctuation URL character (?: # Unroll the Loop: Only allow puctuation URL character if followed by a non-punctuation URL character [\'.,;:!?)] # Punctuation URL character [\\w\\x80-\\xff#%\\~/@\\[\\]*(+=&$-]++ # Non-punctuation URL character )* ) (\)?) # 3: Trailing closing parenthesis (for parethesis balancing post processing) ~xS'; // The regex is a non-anchored pattern and does not have a single fixed starting character. // Tell PCRE to spend more time optimizing since, when used on a page load, it will probably be used several times. $ret = preg_replace_callback( $url_clickable, '_make_url_clickable_cb', $ret ); $ret = preg_replace_callback( '#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]+)#is', '_make_web_ftp_clickable_cb', $ret ); $ret = preg_replace_callback( '#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret ); $ret = substr( $ret, 1, -1 ); // Remove our whitespace padding. $r .= $ret; } } // Cleanup of accidental links within links $r = preg_replace( '#(<a( [^>]+?>|>))<a [^>]+?>([^>]+?)</a></a>#i', "$1$3</a>", $r ); return $r; } /** * Breaks a string into chunks by splitting at whitespace characters. * The length of each returned chunk is as close to the specified length goal as possible, * with the caveat that each chunk includes its trailing delimiter. * Chunks longer than the goal are guaranteed to not have any inner whitespace. * * Joining the returned chunks with empty delimiters reconstructs the input string losslessly. * * Input string must have no null characters (or eventual transformations on output chunks must not care about null characters) * * <code> * _split_str_by_whitespace( "1234 67890 1234 67890a cd 1234 890 123456789 1234567890a 45678 1 3 5 7 90 ", 10 ) == * array ( * 0 => '1234 67890 ', // 11 characters: Perfect split * 1 => '1234 ', // 5 characters: '1234 67890a' was too long * 2 => '67890a cd ', // 10 characters: '67890a cd 1234' was too long * 3 => '1234 890 ', // 11 characters: Perfect split * 4 => '123456789 ', // 10 characters: '123456789 1234567890a' was too long * 5 => '1234567890a ', // 12 characters: Too long, but no inner whitespace on which to split * 6 => ' 45678 ', // 11 characters: Perfect split * 7 => '1 3 5 7 9', // 9 characters: End of $string * ); * </code> * * @since 3.4.0 * @access private * * @param string $string The string to split * @param int $goal The desired chunk length. * @return array Numeric array of chunks. */ function _split_str_by_whitespace( $string, $goal ) { $chunks = array(); $string_nullspace = strtr( $string, "\r\n\t\v\f ", "\000\000\000\000\000\000" ); while ( $goal < strlen( $string_nullspace ) ) { $pos = strrpos( substr( $string_nullspace, 0, $goal + 1 ), "\000" ); if ( false === $pos ) { $pos = strpos( $string_nullspace, "\000", $goal + 1 ); if ( false === $pos ) { break; } } $chunks[] = substr( $string, 0, $pos + 1 ); $string = substr( $string, $pos + 1 ); $string_nullspace = substr( $string_nullspace, $pos + 1 ); } if ( $string ) { $chunks[] = $string; } return $chunks; } /** * Adds rel nofollow string to all HTML A elements in content. * * @since 1.5.0 * * @param string $text Content that may contain HTML A elements. * @return string Converted content. */ function wp_rel_nofollow( $text ) { // This is a pre save filter, so text is already escaped. $text = stripslashes($text); $text = preg_replace_callback('|<a (.+?)>|i', 'wp_rel_nofollow_callback', $text); $text = esc_sql($text); return $text; } /** * Callback to used to add rel=nofollow string to HTML A element. * * Will remove already existing rel="nofollow" and rel='nofollow' from the * string to prevent from invalidating (X)HTML. * * @since 2.3.0 * * @param array $matches Single Match * @return string HTML A Element with rel nofollow. */ function wp_rel_nofollow_callback( $matches ) { $text = $matches[1]; $text = str_replace(array(' rel="nofollow"', " rel='nofollow'"), '', $text); return "<a $text rel=\"nofollow\">"; } /** * Convert one smiley code to the icon graphic file equivalent. * * Looks up one smiley code in the $wpsmiliestrans global array and returns an * <img> string for that smiley. * * @global array $wpsmiliestrans * @since 2.8.0 * * @param string $smiley Smiley code to convert to image. * @return string Image string for smiley. */ function translate_smiley($smiley) { global $wpsmiliestrans; if (count($smiley) == 0) { return ''; } $smiley = trim(reset($smiley)); $img = $wpsmiliestrans[$smiley]; $smiley_masked = esc_attr($smiley); $srcurl = apply_filters('smilies_src', includes_url("images/smilies/$img"), $img, site_url()); return " <img src='$srcurl' alt='$smiley_masked' class='wp-smiley' /> "; } /** * Convert text equivalent of smilies to images. * * Will only convert smilies if the option 'use_smilies' is true and the global * used in the function isn't empty. * * @since 0.71 * @uses $wp_smiliessearch * * @param string $text Content to convert smilies from text. * @return string Converted content with text smilies replaced with images. */ function convert_smilies($text) { global $wp_smiliessearch; $output = ''; if ( get_option('use_smilies') && !empty($wp_smiliessearch) ) { // HTML loop taken from texturize function, could possible be consolidated $textarr = preg_split("/(<.*>)/U", $text, -1, PREG_SPLIT_DELIM_CAPTURE); // capture the tags as well as in between $stop = count($textarr);// loop stuff for ($i = 0; $i < $stop; $i++) { $content = $textarr[$i]; if ((strlen($content) > 0) && ('<' != $content[0])) { // If it's not a tag $content = preg_replace_callback($wp_smiliessearch, 'translate_smiley', $content); } $output .= $content; } } else { // return default text. $output = $text; } return $output; } /** * Verifies that an email is valid. * * Does not grok i18n domains. Not RFC compliant. * * @since 0.71 * * @param string $email Email address to verify. * @param boolean $deprecated Deprecated. * @return string|bool Either false or the valid email address. */ function is_email( $email, $deprecated = false ) { if ( ! empty( $deprecated ) ) _deprecated_argument( __FUNCTION__, '3.0' ); // Test for the minimum length the email can be if ( strlen( $email ) < 3 ) { return apply_filters( 'is_email', false, $email, 'email_too_short' ); } // Test for an @ character after the first position if ( strpos( $email, '@', 1 ) === false ) { return apply_filters( 'is_email', false, $email, 'email_no_at' ); } // Split out the local and domain parts list( $local, $domain ) = explode( '@', $email, 2 ); // LOCAL PART // Test for invalid characters if ( !preg_match( '/^[a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]+$/', $local ) ) { return apply_filters( 'is_email', false, $email, 'local_invalid_chars' ); } // DOMAIN PART // Test for sequences of periods if ( preg_match( '/\.{2,}/', $domain ) ) { return apply_filters( 'is_email', false, $email, 'domain_period_sequence' ); } // Test for leading and trailing periods and whitespace if ( trim( $domain, " \t\n\r\0\x0B." ) !== $domain ) { return apply_filters( 'is_email', false, $email, 'domain_period_limits' ); } // Split the domain into subs $subs = explode( '.', $domain ); // Assume the domain will have at least two subs if ( 2 > count( $subs ) ) { return apply_filters( 'is_email', false, $email, 'domain_no_periods' ); } // Loop through each sub foreach ( $subs as $sub ) { // Test for leading and trailing hyphens and whitespace if ( trim( $sub, " \t\n\r\0\x0B-" ) !== $sub ) { return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' ); } // Test for invalid characters if ( !preg_match('/^[a-z0-9-]+$/i', $sub ) ) { return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' ); } } // Congratulations your email made it! return apply_filters( 'is_email', $email, $email, null ); } /** * Convert to ASCII from email subjects. * * @since 1.2.0 * @usedby wp_mail() handles charsets in email subjects * * @param string $string Subject line * @return string Converted string to ASCII */ function wp_iso_descrambler($string) { /* this may only work with iso-8859-1, I'm afraid */ if (!preg_match('#\=\?(.+)\?Q\?(.+)\?\=#i', $string, $matches)) { return $string; } else { $subject = str_replace('_', ' ', $matches[2]); $subject = preg_replace_callback('#\=([0-9a-f]{2})#i', '_wp_iso_convert', $subject); return $subject; } } /** * Helper function to convert hex encoded chars to ascii * * @since 3.1.0 * @access private * @param array $match the preg_replace_callback matches array */ function _wp_iso_convert( $match ) { return chr( hexdec( strtolower( $match[1] ) ) ); } /** * Returns a date in the GMT equivalent. * * Requires and returns a date in the Y-m-d H:i:s format. Simply subtracts the * value of the 'gmt_offset' option. Return format can be overridden using the * $format parameter. The DateTime and DateTimeZone classes are used to respect * time zone differences in DST. * * @since 1.2.0 * * @uses get_option() to retrieve the the value of 'gmt_offset'. * @param string $string The date to be converted. * @param string $format The format string for the returned date (default is Y-m-d H:i:s) * @return string GMT version of the date provided. */ function get_gmt_from_date($string, $format = 'Y-m-d H:i:s') { preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches); $tz = get_option('timezone_string'); if ( $tz ) { date_default_timezone_set( $tz ); $datetime = new DateTime( $string ); $datetime->setTimezone( new DateTimeZone('UTC') ); $offset = $datetime->getOffset(); $datetime->modify( '+' . $offset / 3600 . ' hours'); $string_gmt = gmdate($format, $datetime->format('U')); date_default_timezone_set('UTC'); } else { $string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]); $string_gmt = gmdate($format, $string_time - get_option('gmt_offset') * 3600); } return $string_gmt; } /** * Converts a GMT date into the correct format for the blog. * * Requires and returns in the Y-m-d H:i:s format. Simply adds the value of * gmt_offset.Return format can be overridden using the $format parameter * * @since 1.2.0 * * @param string $string The date to be converted. * @param string $format The format string for the returned date (default is Y-m-d H:i:s) * @return string Formatted date relative to the GMT offset. */ function get_date_from_gmt($string, $format = 'Y-m-d H:i:s') { preg_match('#([0-9]{1,4})-([0-9]{1,2})-([0-9]{1,2}) ([0-9]{1,2}):([0-9]{1,2}):([0-9]{1,2})#', $string, $matches); $string_time = gmmktime($matches[4], $matches[5], $matches[6], $matches[2], $matches[3], $matches[1]); $string_localtime = gmdate($format, $string_time + get_option('gmt_offset')*3600); return $string_localtime; } /** * Computes an offset in seconds from an iso8601 timezone. * * @since 1.5.0 * * @param string $timezone Either 'Z' for 0 offset or '±hhmm'. * @return int|float The offset in seconds. */ function iso8601_timezone_to_offset($timezone) { // $timezone is either 'Z' or '[+|-]hhmm' if ($timezone == 'Z') { $offset = 0; } else { $sign = (substr($timezone, 0, 1) == '+') ? 1 : -1; $hours = intval(substr($timezone, 1, 2)); $minutes = intval(substr($timezone, 3, 4)) / 60; $offset = $sign * 3600 * ($hours + $minutes); } return $offset; } /** * Converts an iso8601 date to MySQL DateTime format used by post_date[_gmt]. * * @since 1.5.0 * * @param string $date_string Date and time in ISO 8601 format {@link http://en.wikipedia.org/wiki/ISO_8601}. * @param string $timezone Optional. If set to GMT returns the time minus gmt_offset. Default is 'user'. * @return string The date and time in MySQL DateTime format - Y-m-d H:i:s. */ function iso8601_to_datetime($date_string, $timezone = 'user') { $timezone = strtolower($timezone); if ($timezone == 'gmt') { preg_match('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', $date_string, $date_bits); if (!empty($date_bits[7])) { // we have a timezone, so let's compute an offset $offset = iso8601_timezone_to_offset($date_bits[7]); } else { // we don't have a timezone, so we assume user local timezone (not server's!) $offset = 3600 * get_option('gmt_offset'); } $timestamp = gmmktime($date_bits[4], $date_bits[5], $date_bits[6], $date_bits[2], $date_bits[3], $date_bits[1]); $timestamp -= $offset; return gmdate('Y-m-d H:i:s', $timestamp); } else if ($timezone == 'user') { return preg_replace('#([0-9]{4})([0-9]{2})([0-9]{2})T([0-9]{2}):([0-9]{2}):([0-9]{2})(Z|[\+|\-][0-9]{2,4}){0,1}#', '$1-$2-$3 $4:$5:$6', $date_string); } } /** * Adds a element attributes to open links in new windows. * * Comment text in popup windows should be filtered through this. Right now it's * a moderately dumb function, ideally it would detect whether a target or rel * attribute was already there and adjust its actions accordingly. * * @since 0.71 * * @param string $text Content to replace links to open in a new window. * @return string Content that has filtered links. */ function popuplinks($text) { $text = preg_replace('/<a (.+?)>/i', "<a $1 target='_blank' rel='external'>", $text); return $text; } /** * Strips out all characters that are not allowable in an email. * * @since 1.5.0 * * @param string $email Email address to filter. * @return string Filtered email address. */ function sanitize_email( $email ) { // Test for the minimum length the email can be if ( strlen( $email ) < 3 ) { return apply_filters( 'sanitize_email', '', $email, 'email_too_short' ); } // Test for an @ character after the first position if ( strpos( $email, '@', 1 ) === false ) { return apply_filters( 'sanitize_email', '', $email, 'email_no_at' ); } // Split out the local and domain parts list( $local, $domain ) = explode( '@', $email, 2 ); // LOCAL PART // Test for invalid characters $local = preg_replace( '/[^a-zA-Z0-9!#$%&\'*+\/=?^_`{|}~\.-]/', '', $local ); if ( '' === $local ) { return apply_filters( 'sanitize_email', '', $email, 'local_invalid_chars' ); } // DOMAIN PART // Test for sequences of periods $domain = preg_replace( '/\.{2,}/', '', $domain ); if ( '' === $domain ) { return apply_filters( 'sanitize_email', '', $email, 'domain_period_sequence' ); } // Test for leading and trailing periods and whitespace $domain = trim( $domain, " \t\n\r\0\x0B." ); if ( '' === $domain ) { return apply_filters( 'sanitize_email', '', $email, 'domain_period_limits' ); } // Split the domain into subs $subs = explode( '.', $domain ); // Assume the domain will have at least two subs if ( 2 > count( $subs ) ) { return apply_filters( 'sanitize_email', '', $email, 'domain_no_periods' ); } // Create an array that will contain valid subs $new_subs = array(); // Loop through each sub foreach ( $subs as $sub ) { // Test for leading and trailing hyphens $sub = trim( $sub, " \t\n\r\0\x0B-" ); // Test for invalid characters $sub = preg_replace( '/[^a-z0-9-]+/i', '', $sub ); // If there's anything left, add it to the valid subs if ( '' !== $sub ) { $new_subs[] = $sub; } } // If there aren't 2 or more valid subs if ( 2 > count( $new_subs ) ) { return apply_filters( 'sanitize_email', '', $email, 'domain_no_valid_subs' ); } // Join valid subs into the new domain $domain = join( '.', $new_subs ); // Put the email back together $email = $local . '@' . $domain; // Congratulations your email made it! return apply_filters( 'sanitize_email', $email, $email, null ); } /** * Determines the difference between two timestamps. * * The difference is returned in a human readable format such as "1 hour", * "5 mins", "2 days". * * @since 1.5.0 * * @param int $from Unix timestamp from which the difference begins. * @param int $to Optional. Unix timestamp to end the time difference. Default becomes time() if not set. * @return string Human readable time difference. */ function human_time_diff( $from, $to = '' ) { if ( empty($to) ) $to = time(); $diff = (int) abs($to - $from); if ($diff <= 3600) { $mins = round($diff / 60); if ($mins <= 1) { $mins = 1; } /* translators: min=minute */ $since = sprintf(_n('%s min', '%s mins', $mins), $mins); } else if (($diff <= 86400) && ($diff > 3600)) { $hours = round($diff / 3600); if ($hours <= 1) { $hours = 1; } $since = sprintf(_n('%s hour', '%s hours', $hours), $hours); } elseif ($diff >= 86400) { $days = round($diff / 86400); if ($days <= 1) { $days = 1; } $since = sprintf(_n('%s day', '%s days', $days), $days); } return $since; } /** * Generates an excerpt from the content, if needed. * * The excerpt word amount will be 55 words and if the amount is greater than * that, then the string ' [...]' will be appended to the excerpt. If the string * is less than 55 words, then the content will be returned as is. * * The 55 word limit can be modified by plugins/themes using the excerpt_length filter * The ' [...]' string can be modified by plugins/themes using the excerpt_more filter * * @since 1.5.0 * * @param string $text Optional. The excerpt. If set to empty, an excerpt is generated. * @return string The excerpt. */ function wp_trim_excerpt($text = '') { $raw_excerpt = $text; if ( '' == $text ) { $text = get_the_content(''); $text = strip_shortcodes( $text ); $text = apply_filters('the_content', $text); $text = str_replace(']]>', ']]>', $text); $excerpt_length = apply_filters('excerpt_length', 55); $excerpt_more = apply_filters('excerpt_more', ' ' . '[...]'); $text = wp_trim_words( $text, $excerpt_length, $excerpt_more ); } return apply_filters('wp_trim_excerpt', $text, $raw_excerpt); } /** * Trims text to a certain number of words. * * This function is localized. For languages that count 'words' by the individual * character (such as East Asian languages), the $num_words argument will apply * to the number of individual characters. * * @since 3.3.0 * * @param string $text Text to trim. * @param int $num_words Number of words. Default 55. * @param string $more What to append if $text needs to be trimmed. Default '…'. * @return string Trimmed text. */ function wp_trim_words( $text, $num_words = 55, $more = null ) { if ( null === $more ) $more = __( '…' ); $original_text = $text; $text = wp_strip_all_tags( $text ); /* translators: If your word count is based on single characters (East Asian characters), enter 'characters'. Otherwise, enter 'words'. Do not translate into your own language. */ if ( 'characters' == _x( 'words', 'word count: words or characters?' ) && preg_match( '/^utf\-?8$/i', get_option( 'blog_charset' ) ) ) { $text = trim( preg_replace( "/[\n\r\t ]+/", ' ', $text ), ' ' ); preg_match_all( '/./u', $text, $words_array ); $words_array = array_slice( $words_array[0], 0, $num_words + 1 ); $sep = ''; } else { $words_array = preg_split( "/[\n\r\t ]+/", $text, $num_words + 1, PREG_SPLIT_NO_EMPTY ); $sep = ' '; } if ( count( $words_array ) > $num_words ) { array_pop( $words_array ); $text = implode( $sep, $words_array ); $text = $text . $more; } else { $text = implode( $sep, $words_array ); } return apply_filters( 'wp_trim_words', $text, $num_words, $more, $original_text ); } /** * Converts named entities into numbered entities. * * @since 1.5.1 * * @param string $text The text within which entities will be converted. * @return string Text with converted entities. */ function ent2ncr($text) { // Allow a plugin to short-circuit and override the mappings. $filtered = apply_filters( 'pre_ent2ncr', null, $text ); if( null !== $filtered ) return $filtered; $to_ncr = array( '"' => '"', '&' => '&', '⁄' => '/', '<' => '<', '>' => '>', '|' => '|', ' ' => ' ', '¡' => '¡', '¢' => '¢', '£' => '£', '¤' => '¤', '¥' => '¥', '¦' => '¦', '&brkbar;' => '¦', '§' => '§', '¨' => '¨', '¨' => '¨', '©' => '©', 'ª' => 'ª', '«' => '«', '¬' => '¬', '­' => '­', '®' => '®', '¯' => '¯', '&hibar;' => '¯', '°' => '°', '±' => '±', '²' => '²', '³' => '³', '´' => '´', 'µ' => 'µ', '¶' => '¶', '·' => '·', '¸' => '¸', '¹' => '¹', 'º' => 'º', '»' => '»', '¼' => '¼', '½' => '½', '¾' => '¾', '¿' => '¿', 'À' => 'À', 'Á' => 'Á', 'Â' => 'Â', 'Ã' => 'Ã', 'Ä' => 'Ä', 'Å' => 'Å', 'Æ' => 'Æ', 'Ç' => 'Ç', 'È' => 'È', 'É' => 'É', 'Ê' => 'Ê', 'Ë' => 'Ë', 'Ì' => 'Ì', 'Í' => 'Í', 'Î' => 'Î', 'Ï' => 'Ï', 'Ð' => 'Ð', 'Ñ' => 'Ñ', 'Ò' => 'Ò', 'Ó' => 'Ó', 'Ô' => 'Ô', 'Õ' => 'Õ', 'Ö' => 'Ö', '×' => '×', 'Ø' => 'Ø', 'Ù' => 'Ù', 'Ú' => 'Ú', 'Û' => 'Û', 'Ü' => 'Ü', 'Ý' => 'Ý', 'Þ' => 'Þ', 'ß' => 'ß', 'à' => 'à', 'á' => 'á', 'â' => 'â', 'ã' => 'ã', 'ä' => 'ä', 'å' => 'å', 'æ' => 'æ', 'ç' => 'ç', 'è' => 'è', 'é' => 'é', 'ê' => 'ê', 'ë' => 'ë', 'ì' => 'ì', 'í' => 'í', 'î' => 'î', 'ï' => 'ï', 'ð' => 'ð', 'ñ' => 'ñ', 'ò' => 'ò', 'ó' => 'ó', 'ô' => 'ô', 'õ' => 'õ', 'ö' => 'ö', '÷' => '÷', 'ø' => 'ø', 'ù' => 'ù', 'ú' => 'ú', 'û' => 'û', 'ü' => 'ü', 'ý' => 'ý', 'þ' => 'þ', 'ÿ' => 'ÿ', 'Œ' => 'Œ', 'œ' => 'œ', 'Š' => 'Š', 'š' => 'š', 'Ÿ' => 'Ÿ', 'ƒ' => 'ƒ', 'ˆ' => 'ˆ', '˜' => '˜', 'Α' => 'Α', 'Β' => 'Β', 'Γ' => 'Γ', 'Δ' => 'Δ', 'Ε' => 'Ε', 'Ζ' => 'Ζ', 'Η' => 'Η', 'Θ' => 'Θ', 'Ι' => 'Ι', 'Κ' => 'Κ', 'Λ' => 'Λ', 'Μ' => 'Μ', 'Ν' => 'Ν', 'Ξ' => 'Ξ', 'Ο' => 'Ο', 'Π' => 'Π', 'Ρ' => 'Ρ', 'Σ' => 'Σ', 'Τ' => 'Τ', 'Υ' => 'Υ', 'Φ' => 'Φ', 'Χ' => 'Χ', 'Ψ' => 'Ψ', 'Ω' => 'Ω', 'α' => 'α', 'β' => 'β', 'γ' => 'γ', 'δ' => 'δ', 'ε' => 'ε', 'ζ' => 'ζ', 'η' => 'η', 'θ' => 'θ', 'ι' => 'ι', 'κ' => 'κ', 'λ' => 'λ', 'μ' => 'μ', 'ν' => 'ν', 'ξ' => 'ξ', 'ο' => 'ο', 'π' => 'π', 'ρ' => 'ρ', 'ς' => 'ς', 'σ' => 'σ', 'τ' => 'τ', 'υ' => 'υ', 'φ' => 'φ', 'χ' => 'χ', 'ψ' => 'ψ', 'ω' => 'ω', 'ϑ' => 'ϑ', 'ϒ' => 'ϒ', 'ϖ' => 'ϖ', ' ' => ' ', ' ' => ' ', ' ' => ' ', '‌' => '‌', '‍' => '‍', '‎' => '‎', '‏' => '‏', '–' => '–', '—' => '—', '‘' => '‘', '’' => '’', '‚' => '‚', '“' => '“', '”' => '”', '„' => '„', '†' => '†', '‡' => '‡', '•' => '•', '…' => '…', '‰' => '‰', '′' => '′', '″' => '″', '‹' => '‹', '›' => '›', '‾' => '‾', '⁄' => '⁄', '€' => '€', 'ℑ' => 'ℑ', '℘' => '℘', 'ℜ' => 'ℜ', '™' => '™', 'ℵ' => 'ℵ', '↵' => '↵', '⇐' => '⇐', '⇑' => '⇑', '⇒' => '⇒', '⇓' => '⇓', '⇔' => '⇔', '∀' => '∀', '∂' => '∂', '∃' => '∃', '∅' => '∅', '∇' => '∇', '∈' => '∈', '∉' => '∉', '∋' => '∋', '∏' => '∏', '∑' => '∑', '−' => '−', '∗' => '∗', '√' => '√', '∝' => '∝', '∞' => '∞', '∠' => '∠', '∧' => '∧', '∨' => '∨', '∩' => '∩', '∪' => '∪', '∫' => '∫', '∴' => '∴', '∼' => '∼', '≅' => '≅', '≈' => '≈', '≠' => '≠', '≡' => '≡', '≤' => '≤', '≥' => '≥', '⊂' => '⊂', '⊃' => '⊃', '⊄' => '⊄', '⊆' => '⊆', '⊇' => '⊇', '⊕' => '⊕', '⊗' => '⊗', '⊥' => '⊥', '⋅' => '⋅', '⌈' => '⌈', '⌉' => '⌉', '⌊' => '⌊', '⌋' => '⌋', '⟨' => '〈', '⟩' => '〉', '←' => '←', '↑' => '↑', '→' => '→', '↓' => '↓', '↔' => '↔', '◊' => '◊', '♠' => '♠', '♣' => '♣', '♥' => '♥', '♦' => '♦' ); return str_replace( array_keys($to_ncr), array_values($to_ncr), $text ); } /** * Formats text for the rich text editor. * * The filter 'richedit_pre' is applied here. If $text is empty the filter will * be applied to an empty string. * * @since 2.0.0 * * @param string $text The text to be formatted. * @return string The formatted text after filter is applied. */ function wp_richedit_pre($text) { // Filtering a blank results in an annoying <br />\n if ( empty($text) ) return apply_filters('richedit_pre', ''); $output = convert_chars($text); $output = wpautop($output); $output = htmlspecialchars($output, ENT_NOQUOTES); return apply_filters('richedit_pre', $output); } /** * Formats text for the HTML editor. * * Unless $output is empty it will pass through htmlspecialchars before the * 'htmledit_pre' filter is applied. * * @since 2.5.0 * * @param string $output The text to be formatted. * @return string Formatted text after filter applied. */ function wp_htmledit_pre($output) { if ( !empty($output) ) $output = htmlspecialchars($output, ENT_NOQUOTES); // convert only < > & return apply_filters('htmledit_pre', $output); } /** * Perform a deep string replace operation to ensure the values in $search are no longer present * * Repeats the replacement operation until it no longer replaces anything so as to remove "nested" values * e.g. $subject = '%0%0%0DDD', $search ='%0D', $result ='' rather than the '%0%0DD' that * str_replace would return * * @since 2.8.1 * @access private * * @param string|array $search * @param string $subject * @return string The processed string */ function _deep_replace( $search, $subject ) { $found = true; $subject = (string) $subject; while ( $found ) { $found = false; foreach ( (array) $search as $val ) { while ( strpos( $subject, $val ) !== false ) { $found = true; $subject = str_replace( $val, '', $subject ); } } } return $subject; } /** * Escapes data for use in a MySQL query * * This is just a handy shortcut for $wpdb->escape(), for completeness' sake * * @since 2.8.0 * @param string $sql Unescaped SQL data * @return string The cleaned $sql */ function esc_sql( $sql ) { global $wpdb; return $wpdb->escape( $sql ); } /** * Checks and cleans a URL. * * A number of characters are removed from the URL. If the URL is for displaying * (the default behaviour) ampersands are also replaced. The 'clean_url' filter * is applied to the returned cleaned URL. * * @since 2.8.0 * @uses wp_kses_bad_protocol() To only permit protocols in the URL set * via $protocols or the common ones set in the function. * * @param string $url The URL to be cleaned. * @param array $protocols Optional. An array of acceptable protocols. * Defaults to 'http', 'https', 'ftp', 'ftps', 'mailto', 'news', 'irc', 'gopher', 'nntp', 'feed', 'telnet', 'mms', 'rtsp', 'svn' if not set. * @param string $_context Private. Use esc_url_raw() for database usage. * @return string The cleaned $url after the 'clean_url' filter is applied. */ function esc_url( $url, $protocols = null, $_context = 'display' ) { $original_url = $url; if ( '' == $url ) return $url; $url = preg_replace('|[^a-z0-9-~+_.?#=!&;,/:%@$\|*\'()\\x80-\\xff]|i', '', $url); $strip = array('%0d', '%0a', '%0D', '%0A'); $url = _deep_replace($strip, $url); $url = str_replace(';//', '://', $url); /* If the URL doesn't appear to contain a scheme, we * presume it needs http:// appended (unless a relative * link starting with /, # or ? or a php file). */ if ( strpos($url, ':') === false && ! in_array( $url[0], array( '/', '#', '?' ) ) && ! preg_match('/^[a-z0-9-]+?\.php/i', $url) ) $url = 'http://' . $url; // Replace ampersands and single quotes only when displaying. if ( 'display' == $_context ) { $url = wp_kses_normalize_entities( $url ); $url = str_replace( '&', '&', $url ); $url = str_replace( "'", ''', $url ); } if ( ! is_array( $protocols ) ) $protocols = wp_allowed_protocols(); if ( wp_kses_bad_protocol( $url, $protocols ) != $url ) return ''; return apply_filters('clean_url', $url, $original_url, $_context); } /** * Performs esc_url() for database usage. * * @since 2.8.0 * @uses esc_url() * * @param string $url The URL to be cleaned. * @param array $protocols An array of acceptable protocols. * @return string The cleaned URL. */ function esc_url_raw( $url, $protocols = null ) { return esc_url( $url, $protocols, 'db' ); } /** * Convert entities, while preserving already-encoded entities. * * @link http://www.php.net/htmlentities Borrowed from the PHP Manual user notes. * * @since 1.2.2 * * @param string $myHTML The text to be converted. * @return string Converted text. */ function htmlentities2($myHTML) { $translation_table = get_html_translation_table( HTML_ENTITIES, ENT_QUOTES ); $translation_table[chr(38)] = '&'; return preg_replace( "/&(?![A-Za-z]{0,4}\w{2,3};|#[0-9]{2,3};)/", "&", strtr($myHTML, $translation_table) ); } /** * Escape single quotes, htmlspecialchar " < > &, and fix line endings. * * Escapes text strings for echoing in JS. It is intended to be used for inline JS * (in a tag attribute, for example onclick="..."). Note that the strings have to * be in single quotes. The filter 'js_escape' is also applied here. * * @since 2.8.0 * * @param string $text The text to be escaped. * @return string Escaped text. */ function esc_js( $text ) { $safe_text = wp_check_invalid_utf8( $text ); $safe_text = _wp_specialchars( $safe_text, ENT_COMPAT ); $safe_text = preg_replace( '/&#(x)?0*(?(1)27|39);?/i', "'", stripslashes( $safe_text ) ); $safe_text = str_replace( "\r", '', $safe_text ); $safe_text = str_replace( "\n", '\\n', addslashes( $safe_text ) ); return apply_filters( 'js_escape', $safe_text, $text ); } /** * Escaping for HTML blocks. * * @since 2.8.0 * * @param string $text * @return string */ function esc_html( $text ) { $safe_text = wp_check_invalid_utf8( $text ); $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); return apply_filters( 'esc_html', $safe_text, $text ); } /** * Escaping for HTML attributes. * * @since 2.8.0 * * @param string $text * @return string */ function esc_attr( $text ) { $safe_text = wp_check_invalid_utf8( $text ); $safe_text = _wp_specialchars( $safe_text, ENT_QUOTES ); return apply_filters( 'attribute_escape', $safe_text, $text ); } /** * Escaping for textarea values. * * @since 3.1 * * @param string $text * @return string */ function esc_textarea( $text ) { $safe_text = htmlspecialchars( $text, ENT_QUOTES ); return apply_filters( 'esc_textarea', $safe_text, $text ); } /** * Escape a HTML tag name. * * @since 2.5.0 * * @param string $tag_name * @return string */ function tag_escape($tag_name) { $safe_tag = strtolower( preg_replace('/[^a-zA-Z0-9_:]/', '', $tag_name) ); return apply_filters('tag_escape', $safe_tag, $tag_name); } /** * Escapes text for SQL LIKE special characters % and _. * * @since 2.5.0 * * @param string $text The text to be escaped. * @return string text, safe for inclusion in LIKE query. */ function like_escape($text) { return str_replace(array("%", "_"), array("\\%", "\\_"), $text); } /** * Convert full URL paths to absolute paths. * * Removes the http or https protocols and the domain. Keeps the path '/' at the * beginning, so it isn't a true relative link, but from the web root base. * * @since 2.1.0 * * @param string $link Full URL path. * @return string Absolute path. */ function wp_make_link_relative( $link ) { return preg_replace( '|https?://[^/]+(/.*)|i', '$1', $link ); } /** * Sanitises various option values based on the nature of the option. * * This is basically a switch statement which will pass $value through a number * of functions depending on the $option. * * @since 2.0.5 * * @param string $option The name of the option. * @param string $value The unsanitised value. * @return string Sanitized value. */ function sanitize_option($option, $value) { switch ( $option ) { case 'admin_email' : case 'new_admin_email' : $value = sanitize_email( $value ); if ( ! is_email( $value ) ) { $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization if ( function_exists( 'add_settings_error' ) ) add_settings_error( $option, 'invalid_admin_email', __( 'The email address entered did not appear to be a valid email address. Please enter a valid email address.' ) ); } break; case 'thumbnail_size_w': case 'thumbnail_size_h': case 'medium_size_w': case 'medium_size_h': case 'large_size_w': case 'large_size_h': case 'embed_size_h': case 'default_post_edit_rows': case 'mailserver_port': case 'comment_max_links': case 'page_on_front': case 'page_for_posts': case 'rss_excerpt_length': case 'default_category': case 'default_email_category': case 'default_link_category': case 'close_comments_days_old': case 'comments_per_page': case 'thread_comments_depth': case 'users_can_register': case 'start_of_week': $value = absint( $value ); break; case 'embed_size_w': if ( '' !== $value ) $value = absint( $value ); break; case 'posts_per_page': case 'posts_per_rss': $value = (int) $value; if ( empty($value) ) $value = 1; if ( $value < -1 ) $value = abs($value); break; case 'default_ping_status': case 'default_comment_status': // Options that if not there have 0 value but need to be something like "closed" if ( $value == '0' || $value == '') $value = 'closed'; break; case 'blogdescription': case 'blogname': $value = addslashes($value); $value = wp_filter_post_kses( $value ); // calls stripslashes then addslashes $value = stripslashes($value); $value = esc_html( $value ); break; case 'blog_charset': $value = preg_replace('/[^a-zA-Z0-9_-]/', '', $value); // strips slashes break; case 'date_format': case 'time_format': case 'mailserver_url': case 'mailserver_login': case 'mailserver_pass': case 'ping_sites': case 'upload_path': $value = strip_tags($value); $value = addslashes($value); $value = wp_filter_kses($value); // calls stripslashes then addslashes $value = stripslashes($value); break; case 'gmt_offset': $value = preg_replace('/[^0-9:.-]/', '', $value); // strips slashes break; case 'siteurl': if ( (bool)preg_match( '#http(s?)://(.+)#i', $value) ) { $value = esc_url_raw($value); } else { $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization if ( function_exists('add_settings_error') ) add_settings_error('siteurl', 'invalid_siteurl', __('The WordPress address you entered did not appear to be a valid URL. Please enter a valid URL.')); } break; case 'home': if ( (bool)preg_match( '#http(s?)://(.+)#i', $value) ) { $value = esc_url_raw($value); } else { $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization if ( function_exists('add_settings_error') ) add_settings_error('home', 'invalid_home', __('The Site address you entered did not appear to be a valid URL. Please enter a valid URL.')); } break; case 'WPLANG': $allowed = get_available_languages(); if ( ! in_array( $value, $allowed ) && ! empty( $value ) ) $value = get_option( $option ); break; case 'timezone_string': $allowed_zones = timezone_identifiers_list(); if ( ! in_array( $value, $allowed_zones ) && ! empty( $value ) ) { $value = get_option( $option ); // Resets option to stored value in the case of failed sanitization if ( function_exists('add_settings_error') ) add_settings_error('timezone_string', 'invalid_timezone_string', __('The timezone you have entered is not valid. Please select a valid timezone.') ); } break; case 'permalink_structure': case 'category_base': case 'tag_base': $value = esc_url_raw( $value ); $value = str_replace( 'http://', '', $value ); break; } $value = apply_filters("sanitize_option_{$option}", $value, $option); return $value; } /** * Parses a string into variables to be stored in an array. * * Uses {@link http://www.php.net/parse_str parse_str()} and stripslashes if * {@link http://www.php.net/magic_quotes magic_quotes_gpc} is on. * * @since 2.2.1 * @uses apply_filters() for the 'wp_parse_str' filter. * * @param string $string The string to be parsed. * @param array $array Variables will be stored in this array. */ function wp_parse_str( $string, &$array ) { parse_str( $string, $array ); if ( get_magic_quotes_gpc() ) $array = stripslashes_deep( $array ); $array = apply_filters( 'wp_parse_str', $array ); } /** * Convert lone less than signs. * * KSES already converts lone greater than signs. * * @uses wp_pre_kses_less_than_callback in the callback function. * @since 2.3.0 * * @param string $text Text to be converted. * @return string Converted text. */ function wp_pre_kses_less_than( $text ) { return preg_replace_callback('%<[^>]*?((?=<)|>|$)%', 'wp_pre_kses_less_than_callback', $text); } /** * Callback function used by preg_replace. * * @uses esc_html to format the $matches text. * @since 2.3.0 * * @param array $matches Populated by matches to preg_replace. * @return string The text returned after esc_html if needed. */ function wp_pre_kses_less_than_callback( $matches ) { if ( false === strpos($matches[0], '>') ) return esc_html($matches[0]); return $matches[0]; } /** * WordPress implementation of PHP sprintf() with filters. * * @since 2.5.0 * @link http://www.php.net/sprintf * * @param string $pattern The string which formatted args are inserted. * @param mixed $args,... Arguments to be formatted into the $pattern string. * @return string The formatted string. */ function wp_sprintf( $pattern ) { $args = func_get_args( ); $len = strlen($pattern); $start = 0; $result = ''; $arg_index = 0; while ( $len > $start ) { // Last character: append and break if ( strlen($pattern) - 1 == $start ) { $result .= substr($pattern, -1); break; } // Literal %: append and continue if ( substr($pattern, $start, 2) == '%%' ) { $start += 2; $result .= '%'; continue; } // Get fragment before next % $end = strpos($pattern, '%', $start + 1); if ( false === $end ) $end = $len; $fragment = substr($pattern, $start, $end - $start); // Fragment has a specifier if ( $pattern[$start] == '%' ) { // Find numbered arguments or take the next one in order if ( preg_match('/^%(\d+)\$/', $fragment, $matches) ) { $arg = isset($args[$matches[1]]) ? $args[$matches[1]] : ''; $fragment = str_replace("%{$matches[1]}$", '%', $fragment); } else { ++$arg_index; $arg = isset($args[$arg_index]) ? $args[$arg_index] : ''; } // Apply filters OR sprintf $_fragment = apply_filters( 'wp_sprintf', $fragment, $arg ); if ( $_fragment != $fragment ) $fragment = $_fragment; else $fragment = sprintf($fragment, strval($arg) ); } // Append to result and move to next fragment $result .= $fragment; $start = $end; } return $result; } /** * Localize list items before the rest of the content. * * The '%l' must be at the first characters can then contain the rest of the * content. The list items will have ', ', ', and', and ' and ' added depending * on the amount of list items in the $args parameter. * * @since 2.5.0 * * @param string $pattern Content containing '%l' at the beginning. * @param array $args List items to prepend to the content and replace '%l'. * @return string Localized list items and rest of the content. */ function wp_sprintf_l($pattern, $args) { // Not a match if ( substr($pattern, 0, 2) != '%l' ) return $pattern; // Nothing to work with if ( empty($args) ) return ''; // Translate and filter the delimiter set (avoid ampersands and entities here) $l = apply_filters('wp_sprintf_l', array( /* translators: used between list items, there is a space after the comma */ 'between' => __(', '), /* translators: used between list items, there is a space after the and */ 'between_last_two' => __(', and '), /* translators: used between only two list items, there is a space after the and */ 'between_only_two' => __(' and '), )); $args = (array) $args; $result = array_shift($args); if ( count($args) == 1 ) $result .= $l['between_only_two'] . array_shift($args); // Loop when more than two args $i = count($args); while ( $i ) { $arg = array_shift($args); $i--; if ( 0 == $i ) $result .= $l['between_last_two'] . $arg; else $result .= $l['between'] . $arg; } return $result . substr($pattern, 2); } /** * Safely extracts not more than the first $count characters from html string. * * UTF-8, tags and entities safe prefix extraction. Entities inside will *NOT* * be counted as one character. For example & will be counted as 4, < as * 3, etc. * * @since 2.5.0 * * @param integer $str String to get the excerpt from. * @param integer $count Maximum number of characters to take. * @return string The excerpt. */ function wp_html_excerpt( $str, $count ) { $str = wp_strip_all_tags( $str, true ); $str = mb_substr( $str, 0, $count ); // remove part of an entity at the end $str = preg_replace( '/&[^;\s]{0,6}$/', '', $str ); return $str; } /** * Add a Base url to relative links in passed content. * * By default it supports the 'src' and 'href' attributes. However this can be * changed via the 3rd param. * * @since 2.7.0 * * @param string $content String to search for links in. * @param string $base The base URL to prefix to links. * @param array $attrs The attributes which should be processed. * @return string The processed content. */ function links_add_base_url( $content, $base, $attrs = array('src', 'href') ) { global $_links_add_base; $_links_add_base = $base; $attrs = implode('|', (array)$attrs); return preg_replace_callback( "!($attrs)=(['\"])(.+?)\\2!i", '_links_add_base', $content ); } /** * Callback to add a base url to relative links in passed content. * * @since 2.7.0 * @access private * * @param string $m The matched link. * @return string The processed link. */ function _links_add_base($m) { global $_links_add_base; //1 = attribute name 2 = quotation mark 3 = URL return $m[1] . '=' . $m[2] . ( preg_match( '#^(\w{1,20}):#', $m[3], $protocol ) && in_array( $protocol[1], wp_allowed_protocols() ) ? $m[3] : path_join( $_links_add_base, $m[3] ) ) . $m[2]; } /** * Adds a Target attribute to all links in passed content. * * This function by default only applies to <a> tags, however this can be * modified by the 3rd param. * * <b>NOTE:</b> Any current target attributed will be stripped and replaced. * * @since 2.7.0 * * @param string $content String to search for links in. * @param string $target The Target to add to the links. * @param array $tags An array of tags to apply to. * @return string The processed content. */ function links_add_target( $content, $target = '_blank', $tags = array('a') ) { global $_links_add_target; $_links_add_target = $target; $tags = implode('|', (array)$tags); return preg_replace_callback( "!<($tags)(.+?)>!i", '_links_add_target', $content ); } /** * Callback to add a target attribute to all links in passed content. * * @since 2.7.0 * @access private * * @param string $m The matched link. * @return string The processed link. */ function _links_add_target( $m ) { global $_links_add_target; $tag = $m[1]; $link = preg_replace('|(target=[\'"](.*?)[\'"])|i', '', $m[2]); return '<' . $tag . $link . ' target="' . esc_attr( $_links_add_target ) . '">'; } // normalize EOL characters and strip duplicate whitespace function normalize_whitespace( $str ) { $str = trim($str); $str = str_replace("\r", "\n", $str); $str = preg_replace( array( '/\n+/', '/[ \t]+/' ), array( "\n", ' ' ), $str ); return $str; } /** * Properly strip all HTML tags including script and style * * @since 2.9.0 * * @param string $string String containing HTML tags * @param bool $remove_breaks optional Whether to remove left over line breaks and white space chars * @return string The processed string. */ function wp_strip_all_tags($string, $remove_breaks = false) { $string = preg_replace( '@<(script|style)[^>]*?>.*?</\\1>@si', '', $string ); $string = strip_tags($string); if ( $remove_breaks ) $string = preg_replace('/[\r\n\t ]+/', ' ', $string); return trim( $string ); } /** * Sanitize a string from user input or from the db * * check for invalid UTF-8, * Convert single < characters to entity, * strip all tags, * remove line breaks, tabs and extra white space, * strip octets. * * @since 2.9.0 * * @param string $str * @return string */ function sanitize_text_field($str) { $filtered = wp_check_invalid_utf8( $str ); if ( strpos($filtered, '<') !== false ) { $filtered = wp_pre_kses_less_than( $filtered ); // This will strip extra whitespace for us. $filtered = wp_strip_all_tags( $filtered, true ); } else { $filtered = trim( preg_replace('/[\r\n\t ]+/', ' ', $filtered) ); } $match = array(); $found = false; while ( preg_match('/%[a-f0-9]{2}/i', $filtered, $match) ) { $filtered = str_replace($match[0], '', $filtered); $found = true; } if ( $found ) { // Strip out the whitespace that may now exist after removing the octets. $filtered = trim( preg_replace('/ +/', ' ', $filtered) ); } return apply_filters('sanitize_text_field', $filtered, $str); } /** * i18n friendly version of basename() * * @since 3.1.0 * * @param string $path A path. * @param string $suffix If the filename ends in suffix this will also be cut off. * @return string */ function wp_basename( $path, $suffix = '' ) { return urldecode( basename( str_replace( '%2F', '/', urlencode( $path ) ), $suffix ) ); } /** * Forever eliminate "Wordpress" from the planet (or at least the little bit we can influence). * * Violating our coding standards for a good function name. * * @since 3.0.0 */ function capital_P_dangit( $text ) { // Simple replacement for titles if ( 'the_title' === current_filter() ) return str_replace( 'Wordpress', 'WordPress', $text ); // Still here? Use the more judicious replacement static $dblq = false; if ( false === $dblq ) $dblq = _x('“', 'opening curly quote'); return str_replace( array( ' Wordpress', '‘Wordpress', $dblq . 'Wordpress', '>Wordpress', '(Wordpress' ), array( ' WordPress', '‘WordPress', $dblq . 'WordPress', '>WordPress', '(WordPress' ), $text ); } /** * Sanitize a mime type * * @since 3.1.3 * * @param string $mime_type Mime type * @return string Sanitized mime type */ function sanitize_mime_type( $mime_type ) { $sani_mime_type = preg_replace( '/[^-+*.a-zA-Z0-9\/]/', '', $mime_type ); return apply_filters( 'sanitize_mime_type', $sani_mime_type, $mime_type ); } /** * Sanitize space or carriage return separated URLs that are used to send trackbacks. * * @since 3.4.0 * * @param string $to_ping Space or carriage return separated URLs * @return string URLs starting with the http or https protocol, separated by a carriage return. */ function sanitize_trackback_urls( $to_ping ) { $urls_to_ping = preg_split( '/[\r\n\t ]/', trim( $to_ping ), -1, PREG_SPLIT_NO_EMPTY ); foreach ( $urls_to_ping as $k => $url ) { if ( !preg_match( '#^https?://.#i', $url ) ) unset( $urls_to_ping[$k] ); } $urls_to_ping = array_map( 'esc_url_raw', $urls_to_ping ); $urls_to_ping = implode( "\n", $urls_to_ping ); return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping ); }