Recursive unserialize functions

recursive_unserialize.php

<?php

// Next two functions taken from a commenter on http://php.net/manual/en/function.unserialize.php
function unserialize_recursive($val) {
	//$pattern = "/.*\{(.*)\}/";
	if(is_serialized($val)){
		$val = trim($val);
		$ret = unserialize($val);
		if (is_array($ret)) {
			foreach($ret as &$r) $r = unserialize_recursive($r); 
		}
		return $ret; 
	} elseif (is_array($val)) {
		foreach($val as &$r) $r = unserialize_recursive($r);
		return $val;
	} else { return $val; } 
}

function is_serialized($val) {
	if (!is_string($val)) return false; 
	if (trim($val) == "") return false; 
	$val = trim($val);
	if (preg_match('/^(i|s|a|o|d):.*{/si', $val) > 0) return true;
	return false; 
}