3v4l.org

run code in 300+ PHP versions simultaneously
<?php $input = "/mystring"; $pattern = "~/?(\w+)(?:\?(\w+))?~"; if (preg_match($pattern, $input, $matches)) { print_r($matches); }
Output for 7.1.25 - 7.1.33, 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [0] => /mystring [1] => mystring )
preferences:
112.29 ms | 1491 KiB | 4 Q