<?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;

static $opening_quote, $closing_quote, $en_dash, $em_dash, $default_no_texturize_tags, $default_no_texturize_shortcodes, $static_characters, $static_replacements, $dynamic_characters, $dynamic_replacements;

// No need to set up these static variables more than once

if ( empty( $opening_quote ) ) {

/* translators: opening curly quote */

$opening_quote = _x('&#8220;', 'opening curly quote');

/* translators: closing curly quote */

$closing_quote = _x('&#8221;', 'closing curly quote');

/* translators: en dash */

$en_dash = _x('&#8211;', 'en dash');

/* translators: em dash */

$em_dash = _x('&#8212;', '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);

} 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;', '...', '``', '\'\'', ' (tm)'), $cockney );

$static_replacements = array_merge( array($em_dash, ' ' . $em_dash . ' ', $en_dash, ' ' . $en_dash . ' ', 'xn--', '&#8230;', $opening_quote, $closing_quote, ' &#8482;'), $cockneyreplace );

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

$dynamic_replacements = array('&#8217;$1','&#8217;$1', '$1&#8216;', '$1&#8243;', '$1&#8242;', '$1&#8217;$2', '$1' . $opening_quote . '$2', $closing_quote . '$1', '&#8217;$1', '$1&#215;$2');

}

// 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};)/', '&#038;$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);

}

}

}

/**

* 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) {

if ( trim($pee) === '' )

return '';

$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|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre|select|option|form|map|area|blockquote|address|math|style|input|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);

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

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

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

* &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 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 &amp; 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( "'", '&#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(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) => '');

$string = strtr($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 ) {

// nbsp, ndash and mdash

$title = str_replace( array( '%c2%a0', '%e2%80%93', '%e2%80%94' ), '-', $title );

// iexcl and iquest

$title = str_replace( array( '%c2%a1', '%c2%bf' ), '', $title );

// angle quotes

$title = str_replace( array( '%c2%ab', '%c2%bb', '%e2%80%b9', '%e2%80%ba' ), '', $title );

// curly quotes

$title = str_replace( array( '%e2%80%98', '%e2%80%99', '%e2%80%9c', '%e2%80%9d' ), '', $title );

// copy, reg, deg, hellip and trade

$title = str_replace( array( '%c2%a9', '%c2%ae', '%c2%b0', '%e2%80%a6', '%e2%84%a2' ), '', $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(

'&#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);