--TEST-- Bug #21732 (preg_replace() segfaults with invalid parameters) --INI-- error_reporting=0 --FILE-- <?php class foo { function cb($param) { var_dump($param); return "yes!"; } } var_dump(preg_replace('', array(), '')); var_dump(preg_replace_callback("/(ab)(cd)(e)/", array(new foo(), "cb"), 'abcde')); ?> --EXPECT-- bool(false) array(4) { [0]=> string(5) "abcde" [1]=> string(2) "ab" [2]=> string(2) "cd" [3]=> string(1) "e" } string(4) "yes!"