PHP: mb_str_replace

mb_str_replace.php

<?php
/**
 * Replace all occurrences of the search string with the replacement string.
 *
 * @author Sean Murphy <sean@iamseanmurphy.com>
 * @copyright Copyright 2012 Sean Murphy. All rights reserved.
 * @license http://creativecommons.org/publicdomain/zero/1.0/
 * @link http://php.net/manual/function.str-replace.php
 *
 * @param mixed $search
 * @param mixed $replace
 * @param mixed $subject
 * @param int $count
 * @return mixed
 */
if (!function_exists('mb_str_replace')) {
	function mb_str_replace($search, $replace, $subject, &$count = 0) {
		if (!is_array($subject)) {
			// Normalize $search and $replace so they are both arrays of the same length
			$searches = is_array($search) ? array_values($search) : array($search);
			$replacements = is_array($replace) ? array_values($replace) : array($replace);
			$replacements = array_pad($replacements, count($searches), '');

			foreach ($searches as $key => $search) {
				$parts = mb_split(preg_quote($search), $subject);
				$count += count($parts) - 1;
				$subject = implode($replacements[$key], $parts);
			}
		} else {
			// Call mb_str_replace for each subject in array, recursively
			foreach ($subject as $key => $value) {
				$subject[$key] = mb_str_replace($search, $replace, $value, $count);
			}
		}

		return $subject;
	}
}
?>