3v4l.org

run code in 300+ PHP versions simultaneously
<?php preg_match_all('/(4)?(2)?\d/', '123456', $matches, PREG_SET_ORDER); var_export($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, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.26, 8.0.0 - 8.0.13, 8.1rc1 - rc3
array ( 0 => array ( 0 => '1', ), 1 => array ( 0 => '23', 1 => '', 2 => '2', ), 2 => array ( 0 => '45', 1 => '4', ), 3 => array ( 0 => '6', ), )

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41.67 ms | 463 KiB | 5 Q