3v4l.org

run code in 300+ PHP versions simultaneously
<?php $subject = <<<EOL 1. first 2. second 3. third EOL; preg_match('/^.{1,20}?$/i', $subject, $matches); var_dump($matches); $subject = "qasd\nasdasd\nasda"; preg_match('/^.{1,20}?$/i', $subject, $matches); var_dump($matches);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.12 - 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
array(0) { } array(0) { }
preferences:
204.06 ms | 405 KiB | 313 Q