--- /dev/null
+<?php
+/**
+* @version $Id: str_ireplace.php,v 1.2 2007/08/12 01:20:46 harryf Exp $
+* @package utf8
+* @subpackage strings
+*/
+
+//---------------------------------------------------------------
+/**
+* UTF-8 aware alternative to str_ireplace
+* Case-insensitive version of str_replace
+* Note: requires utf8_strtolower
+* Note: it's not fast and gets slower if $search / $replace is array
+* Notes: it's based on the assumption that the lower and uppercase
+* versions of a UTF-8 character will have the same length in bytes
+* which is currently true given the hash table to strtolower
+* @param string
+* @return string
+* @see http://www.php.net/str_ireplace
+* @see utf8_strtolower
+* @package utf8
+* @subpackage strings
+*/
+function utf8_ireplace($search, $replace, $str, $count = NULL){
+
+ if ( !is_array($search) ) {
+
+ $slen = strlen($search);
+ if ( $slen == 0 ) {
+ return $str;
+ }
+
+ $lendif = strlen($replace) - strlen($search);
+ $search = utf8_strtolower($search);
+
+ $search = preg_quote($search);
+ $lstr = utf8_strtolower($str);
+ $i = 0;
+ $matched = 0;
+ while ( preg_match('/(.*)'.$search.'/Us',$lstr, $matches) ) {
+ if ( $i === $count ) {
+ break;
+ }
+ $mlen = strlen($matches[0]);
+ $lstr = substr($lstr, $mlen);
+ $str = substr_replace($str, $replace, $matched+strlen($matches[1]), $slen);
+ $matched += $mlen + $lendif;
+ $i++;
+ }
+ return $str;
+
+ } else {
+
+ foreach ( array_keys($search) as $k ) {
+
+ if ( is_array($replace) ) {
+
+ if ( array_key_exists($k,$replace) ) {
+
+ $str = utf8_ireplace($search[$k], $replace[$k], $str, $count);
+
+ } else {
+
+ $str = utf8_ireplace($search[$k], '', $str, $count);
+
+ }
+
+ } else {
+
+ $str = utf8_ireplace($search[$k], $replace, $str, $count);
+
+ }
+ }
+ return $str;
+
+ }
+
+}
+
+