1--TEST-- 2Bug #53037 (FILTER_FLAG_EMPTY_STRING_NULL is not implemented) 3--SKIPIF-- 4<?php if (!extension_loaded("filter")) die("skip"); ?> 5--FILE-- 6<?php 7var_dump( 8 filter_var("", FILTER_DEFAULT), 9 filter_var("", FILTER_DEFAULT, array('flags' => FILTER_FLAG_EMPTY_STRING_NULL)) 10); 11?> 12--EXPECT-- 13string(0) "" 14NULL 15