--TEST-- strstr() - New parameter: before_needle --FILE-- <?php $email = 'aexample.com'; var_dump(strstr($email, '@')); var_dump(strstr($email, '@', 1)); $email = 'a@example.com'; var_dump(strstr($email, '@')); var_dump(strstr($email, '@', 1)); $email = 'asdfasdfas@e'; var_dump(strstr($email, '@')); var_dump(strstr($email, '@', 1)); $email = '@'; var_dump(strstr($email, '@')); var_dump(strstr($email, '@', 1)); $email = 'eE@fF'; var_dump(strstr($email, 'e')); var_dump(strstr($email, 'e', 1)); var_dump(strstr($email, 'E')); var_dump(strstr($email, 'E', 1)); var_dump(strstr('', ' ', '')); ?> --EXPECT-- bool(false) bool(false) string(12) "@example.com" string(1) "a" string(2) "@e" string(10) "asdfasdfas" string(1) "@" string(0) "" string(5) "eE@fF" string(0) "" string(4) "E@fF" string(1) "e" bool(false)