note 71855 deleted from ref.array by felipe

Note Submitter: filip at mxd dot biz 

----

a better array_key_set function:

	function array_key_set(&$array, $key=0) {
		if(is_array($array)) {
			if(!array_key_exists($array, $key)) {
				return false;
			}
			reset($array);
			while($current = key($array)) {
				if($current == $key) {
					return true;
				}
				next($array);
			}
		}
		return false;
	}