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<?php
/**
* @version $Id$
* @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;
}
}