--TEST-- Bug #53037 (FILTER_FLAG_EMPTY_STRING_NULL is not implemented) --SKIPIF-- <?php if (!extension_loaded("filter")) die("skip"); ?> --FILE-- <?php var_dump( filter_var("", FILTER_DEFAULT), filter_var("", FILTER_DEFAULT, array('flags' => FILTER_FLAG_EMPTY_STRING_NULL)) ); ?> --EXPECT-- string(0) "" NULL