81 lines
1.9 KiB
PHP
81 lines
1.9 KiB
PHP
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<?php
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/**
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* @version $Id$
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* @package utf8
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* @subpackage strings
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*/
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//---------------------------------------------------------------
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/**
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* UTF-8 aware alternative to str_ireplace
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* Case-insensitive version of str_replace
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* Note: requires utf8_strtolower
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* Note: it's not fast and gets slower if $search / $replace is array
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* Notes: it's based on the assumption that the lower and uppercase
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* versions of a UTF-8 character will have the same length in bytes
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* which is currently true given the hash table to strtolower
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* @param string
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* @return string
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* @see http://www.php.net/str_ireplace
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* @see utf8_strtolower
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* @package utf8
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* @subpackage strings
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*/
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function utf8_ireplace($search, $replace, $str, $count = NULL){
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if ( !is_array($search) ) {
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$slen = strlen($search);
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if ( $slen == 0 ) {
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return $str;
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}
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$lendif = strlen($replace) - strlen($search);
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$search = utf8_strtolower($search);
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$search = preg_quote($search, '/');
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$lstr = utf8_strtolower($str);
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$i = 0;
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$matched = 0;
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while ( preg_match('/(.*)'.$search.'/Us',$lstr, $matches) ) {
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if ( $i === $count ) {
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break;
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}
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$mlen = strlen($matches[0]);
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$lstr = substr($lstr, $mlen);
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$str = substr_replace($str, $replace, $matched+strlen($matches[1]), $slen);
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$matched += $mlen + $lendif;
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$i++;
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}
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return $str;
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} else {
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foreach ( array_keys($search) as $k ) {
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if ( is_array($replace) ) {
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if ( array_key_exists($k,$replace) ) {
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$str = utf8_ireplace($search[$k], $replace[$k], $str, $count);
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} else {
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$str = utf8_ireplace($search[$k], '', $str, $count);
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}
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} else {
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$str = utf8_ireplace($search[$k], $replace, $str, $count);
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}
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}
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return $str;
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}
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}
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