<?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>

* &#8217;cause today&#8217;s effort makes it worth tomorrow&#8217;s &#8220;holiday&#8221;&#8230;

* </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;

$next = true;

$has_pre_parent = false;

$output = '';

$curl = '';

$textarr = preg_split('/(<.*>|\[.*\])/Us', $text, -1, PREG_SPLIT_DELIM_CAPTURE);

$stop = count($textarr);

// if a plugin has provided an autocorrect array, use it

if ( isset($wp_cockneyreplace) ) {

$cockney = array_keys($wp_cockneyreplace);

$cockneyreplace = array_values($wp_cockneyreplace);

} else {

$cockney = array("'tain't","'twere","'twas","'tis","'twill","'til","'bout","'nuff","'round","'cause");

$cockneyreplace = array("&#8217;tain&#8217;t","&#8217;twere","&#8217;twas","&#8217;tis","&#8217;twill","&#8217;til","&#8217;bout","&#8217;nuff","&#8217;round","&#8217;cause");

}

$static_characters = array_merge(array('---', ' -- ', '--', 'xn&#8211;', '...', '``', '\'s', '\'\'', ' (tm)'), $cockney);

$static_replacements = array_merge(array('&#8212;', ' &#8212; ', '&#8211;', 'xn--', '&#8230;', '&#8220;', '&#8217;s', '&#8221;', ' &#8482;'), $cockneyreplace);

$dynamic_characters = array('/\'(\d\d(?:&#8217;|\')?s)/', '/(\s|\A|")\'/', '/(\d+)"/', '/(\d+)\'/', '/(\S)\'([^\'\s])/', '/(\s|\A)"(?!\s)/', '/"(\s|\S|\Z)/', '/\'([\s.]|\Z)/', '/(\d+)x(\d+)/');

$dynamic_replacements = array('&#8217;$1','$1&#8216;', '$1&#8243;', '$1&#8242;', '$1&#8217;$2', '$1&#8220;$2', '&#8221;$1', '&#8217;$1', '$1&#215;$2');

for ( $i = 0; $i < $stop; $i++ ) {

$curl = $textarr[$i];

if ( !empty($curl) && '<' != $curl{0} && '[' != $curl{0} && $next && !$has_pre_parent) { // If it's not a tag

// static strings

$curl = str_replace($static_characters, $static_replacements, $curl);

// regular expressions

$curl = preg_replace($dynamic_characters, $dynamic_replacements, $curl);

} elseif (strpos($curl, '<code') !== false || strpos($curl, '<kbd') !== false || strpos($curl, '<style') !== false || strpos($curl, '<script') !== false) {

$next = false;

} elseif (strpos($curl, '<pre') !== false) {

$has_pre_parent = true;

} elseif (strpos($curl, '</pre>') !== false) {

$has_pre_parent = false;

} else {

$next = true;

}

$curl = preg_replace('/&([^#])(?![a-zA-Z1-4]{1,8};)/', '&#038;$1', $curl);

$output .= $curl;

}

return $output;

}

/**

* Accepts matches array from preg_replace_callback in wpautop() or a string.

*

* Ensures that the contents of a <<pre>>...<</pre>> HTML block are not

* converted into paragraphs or line-breaks.

*

* @since 1.2.0

*

* @param array|string $matches The array or string

* @return string The pre block without paragraph/line-break conversion.

*/

function clean_pre($matches) {

if ( is_array($matches) )

$text = $matches[1] . $matches[2] . "</pre>";

else

$text = $matches;

$text = str_replace('<br />', '', $text);

$text = str_replace('<p>', "\n", $text);

$text = str_replace('</p>', '', $text);

return $text;

}

/**

* 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 int|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 = 1) {

$pee = $pee . "\n"; // just to make things a little easier, pad the end

$pee = preg_replace('|<br />\s*<br />|', "\n\n", $pee);

// Space things out a little

$allblocks = '(?:table|thead|tfoot|caption|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|form|map|area|blockquote|address|math|style|input|p|h[1-6]|hr)';

$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>([^<]+)\s*?(</(?:div|address|form)[^>]*>)!', "<p>$1</p>$2", $pee);

$pee = preg_replace( '|<p>|', "$1<p>", $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) {

$pee = preg_replace_callback('/<(script|style).*?<\/\\1>/s', create_function('$matches', 'return str_replace("\n", "<WPPreserveNewline />", $matches[0]);'), $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);

if (strpos($pee, '<pre') !== false)

$pee = preg_replace_callback('!(<pre.*?>)(.*?)</pre>!is', 'clean_pre', $pee );

$pee = preg_replace( "|\n</p>$|", '</p>', $pee );

$pee = preg_replace('/<p>\s*?(' . get_shortcode_regex() . ')\s*<\/p>/s', '$1', $pee); // don't auto-p wrap shortcodes that stand alone

return $pee;

}

/**

* Checks to see if a string is utf8 encoded.

*

* @author bmorel at ssi dot fr

*

* @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) { # by bmorel at ssi dot fr

$length = strlen($Str);

for ($i=0; $i < $length; $i++) {

if (ord($Str[$i]) < 0x80) continue; # 0bbbbbbb

elseif ((ord($Str[$i]) & 0xE0) == 0xC0) $n=1; # 110bbbbb

elseif ((ord($Str[$i]) & 0xF0) == 0xE0) $n=2; # 1110bbbb

elseif ((ord($Str[$i]) & 0xF8) == 0xF0) $n=3; # 11110bbb

elseif ((ord($Str[$i]) & 0xFC) == 0xF8) $n=4; # 111110bb

elseif ((ord($Str[$i]) & 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

* &quot;, 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 or not 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 = wp_specialchars_decode( $string, $_quote_style );

$string = preg_replace( '/&(#?x?[0-9]+|[a-z]+);/i', '|wp_entity|$1|/wp_entity|', $string );

}

$string = @htmlspecialchars( $string, $quote_style, $charset );

// Handle double encoding ourselves

if ( !$double_encode ) {

$string = str_replace( array( '|wp_entity|', '|/wp_entity|' ), array( '&', ';' ), $string );

}

// Backwards compatibility

if ( 'single' === $_quote_style ) {

$string = str_replace( "'", '&#039;', $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( '&#039;' => '\'', '&#x27;' => '\'' );

$single_preg = array( '/&#0*39;/' => '&#039;', '/&#x0*27;/i' => '&#x27;' );

$double = array( '&quot;' => '"', '&#034;' => '"', '&#x22;' => '"' );

$double_preg = array( '/&#0*34;/' => '&#034;', '/&#x0*22;/i' => '&#x22;' );

$others = array( '&lt;' => '<', '&#060;' => '<', '&gt;' => '>', '&#062;' => '>', '&amp;' => '&', '&#038;' => '&', '&#x26;' => '&' );

$others_preg = array( '/&#0*60;/' => '&#060;', '/&#0*62;/' => '&#062;', '/&#0*38;/' => '&#038;', '/&#x0*26;/i' => '&#x26;' );

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(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(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(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(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(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(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(182) => '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(191) => 'y',

// 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',

// Euro Sign

chr(226).chr(130).chr(172) => 'E',

// GBP (Pound) Sign

chr(194).chr(163) => '');

$string = strtr($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;

}

/**

* Filters certain characters from the file name.

*

* Turns all strings to lowercase removing most characters except alphanumeric

* with spaces, dashes and periods. All spaces and underscores are converted to

* dashes. Multiple dashes are converted to a single dash. Finally, if the file

* name ends with a dash, it is removed.

*

* @since 2.1.0

*

* @param string $name The file name

* @return string Sanitized file name

*/

function sanitize_file_name( $name ) { // Like sanitize_title, but with periods

$name = strtolower( $name );

$name = preg_replace('/&.+?;/', '', $name); // kill entities

$name = str_replace( '_', '-', $name );

$name = preg_replace('/[^a-z0-9\s-.]/', '', $name);

$name = preg_replace('/\s+/', '-', $name);

$name = preg_replace('|-+|', '-', $name);

$name = trim($name, '-');

return $name;

}

/**

* Sanitize username stripping out unsafe characters.

*

* If $strict is true, only alphanumeric characters (as well as _, space, ., -,

* @) are returned.

* Removes tags, octets, entities, and if strict is enabled, will remove all

* non-ASCII characters. After sanitizing, it passes the username, raw username

* (the username in the parameter), and the strict parameter as parameters for

* the 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;

$username = strip_tags($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);

// Consolidate contiguous whitespace

$username = preg_replace('|\s+|', ' ', $username);

return apply_filters('sanitize_user', $username, $raw_username, $strict);

}

/**

* 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.

* @return string The sanitized string.

*/

function sanitize_title($title, $fallback_title = '') {

$raw_title = $title;

$title = strip_tags($title);

$title = apply_filters('sanitize_title', $title, $raw_title);

if ( '' === $title || false === $title )

$title = $fallback_title;

return $title;

}

/**

* Sanitizes title, replacing whitespace 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.

* @return string The sanitized title.

*/

function sanitize_title_with_dashes($title) {

$title = strip_tags($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);

$title = remove_accents($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 = 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;

}

/**

* 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 = '') {

// Translation of invalid Unicode references range to valid range

$wp_htmltranswinuni = array(

'&#128;' => '&#8364;', // the Euro sign

'&#129;' => '',

'&#130;' => '&#8218;', // these are Windows CP1252 specific characters

'&#131;' => '&#402;', // they would look weird on non-Windows browsers

'&#132;' => '&#8222;',

'&#133;' => '&#8230;',

'&#134;' => '&#8224;',

'&#135;' => '&#8225;',

'&#136;' => '&#710;',

'&#137;' => '&#8240;',

'&#138;' => '&#352;',

'&#139;' => '&#8249;',

'&#140;' => '&#338;',

'&#141;' => '',

'&#142;' => '&#382;',

'&#143;' => '',

'&#144;' => '',

'&#145;' => '&#8216;',

'&#146;' => '&#8217;',

'&#147;' => '&#8220;',

'&#148;' => '&#8221;',

'&#149;' => '&#8226;',

'&#150;' => '&#8211;',

'&#151;' => '&#8212;',

'&#152;' => '&#732;',

'&#153;' => '&#8482;',

'&#154;' => '&#353;',

'&#155;' => '&#8250;',

'&#156;' => '&#339;',

'&#157;' => '',

'&#158;' => '',

'&#159;' => '&#376;'

);

// Remove metadata tags

$content = preg_replace('/<title>(.+?)<\/title>/','',$content);

$content = preg_replace('/<category>(.+?)<\/category>/','',$content);

// Converts lone & characters into &#38; (a.k.a. &amp;)

$content = preg_replace('/&([^#])(?![a-z1-4]{1,8};)/i', '&#038;$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;

}

/**

* Fixes javascript bugs in browsers.

*

* Converts unicode characters to HTML numbered entities.

*

* @since 1.5.0

* @uses $is_macIE

* @uses $is_winIE

*

* @param string $text Text to be made safe.

* @return string Fixed text.

*/

function funky_javascript_fix($text) {

// Fixes for browsers' javascript bugs

global $is_macIE, $is_winIE;

/** @todo use preg_replace_callback() instead */

if ( $is_winIE || $is_macIE )

$text = preg_replace("/\%u([0-9A-F]{4,4})/e", "'&#'.base_convert('\\1',16,10).';'", $text);

return $text;

}

/**

* Will only balance the tags if forced to and the option is set to balance tags.

*

* The option 'use_balanceTags' is used for whether the tags will be balanced.

* Both the $force parameter and 'use_balanceTags' option will have to be true

* before the tags will be balanced.

*

* @since 0.71

*

* @param string $text Text to be balanced

* @param bool $force 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 v2.0

* @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'); //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})#', '&lt;$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 ($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 == '')) {

}

// 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($attributes) {

$attributes = ' '.$attributes;

}

$tag = '<'.$tag.$attributes.'>';

//If already queuing a close tag, then put this tag on, too

if ($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.

*

* Unless $richedit is set, it is simply a holder for the 'format_to_edit'

* filter. If $richedit is set true htmlspecialchars() will be run on the

* content, converting special characters to HTMl entities.

*

* @since 0.71

*

* @param string $content The text about to be edited.

* @param bool $richedit Whether or not the $content should pass through htmlspecialchars(). Default false.

* @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 )

$content = htmlspecialchars($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 number 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;

}

/**