1--TEST--
2callback function returns non modified value
3--SKIPIF--
4<?php if (!extension_loaded("filter")) die("skip"); ?>
5--FILE--
6<?php
7function callback($var) {
8	return $var;
9}
10$var = "test";
11var_dump(filter_var($var, FILTER_CALLBACK, array('options'=>'callback')));
12?>
13--EXPECT--
14string(4) "test"
15