3v4l.org

run code in 300+ PHP versions simultaneously
<?php interface IValidation_Rule { public function validate($value); } class EMail_Rule implements IValidation_Rule { public function validate($email) { if(!is_string($email)) return false; return preg_match("/^.+@.+\..+$/", $email); } } ?>
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING in /in/EHDZp on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING in /in/EHDZp on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/EHDZp on line 3
Process exited with code 255.
preferences:
232.58 ms | 405 KiB | 370 Q