vendor/phputf8/str_ireplace.php

   1 <?php
   2 /**
   3 * @version $Id: str_ireplace.php,v 1.1 2006/02/25 13:50:17 harryf Exp $
   4 * @package utf8
   5 * @subpackage strings
   6 */
   7
   8 //---------------------------------------------------------------
   9 /**
  10 * UTF-8 aware alternative to str_ireplace
  11 * Case-insensitive version of str_replace
  12 * Note: requires utf8_strtolower
  13 * Note: it's not fast and gets slower if $search / $replace is array
  14 * Notes: it's based on the assumption that the lower and uppercase
  15 * versions of a UTF-8 character will have the same length in bytes
  16 * which is currently true given the hash table to strtolower
  17 * @param string
  18 * @return string
  19 * @see http://www.php.net/str_ireplace
  20 * @see utf8_strtolower
  21 * @package utf8
  22 * @subpackage strings
  23 */
  24 function utf8_ireplace($search, $replace, $str, $count = NULL){
  25
  26     if ( !is_array($search) ) {
  27
  28         $slen = strlen($search);
  29         if ( $slen == 0 ) {
  30             return $str;
  31         }
  32
  33         $search = utf8_strtolower($search);
  34
  35         $search = preg_quote($search);
  36         $lstr = utf8_strtolower($str);
  37         $i = 0;
  38         $matched = 0;
  39         while ( preg_match('/(.*)'.$search.'/Us',$lstr, $matches) ) {
  40             if ( $i === $count ) {
  41                 break;
  42             }
  43             $mlen = strlen($matches[0]);
  44             $lstr = substr($lstr, $mlen);
  45             $str = substr_replace($str, $replace, $matched+strlen($matches[1]), $slen);
  46                     $matched += $mlen;
  47             $i++;
  48         }
  49         return $str;
  50
  51     } else {
  52
  53         foreach ( array_keys($search) as $k ) {
  54
  55             if ( is_array($replace) ) {
  56
  57                 if ( array_key_exists($k,$replace) ) {
  58
  59                     $str = utf8_ireplace($search[$k], $replace[$k], $str, $count);
  60
  61                 } else {
  62
  63                     $str = utf8_ireplace($search[$k], '', $str, $count);
  64
  65                 }
  66
  67             } else {
  68
  69                 $str = utf8_ireplace($search[$k], $replace, $str, $count);
  70
  71             }
  72         }
  73         return $str;
  74
  75     }
  76
  77 }
  78
  79