3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = '(ab(cd)ef)'; preg_match_all('@\( ( ( (?>[^()]+) | (?R) )+ ) \)@x', $string, $matches); mb_ereg('\([^()]+\)', $string, $regs); var_dump($matches, $regs);
Output for 4.3.4 - 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, 7.2.0 - 7.2.33, 7.3.12 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
array(3) { [0]=> array(1) { [0]=> string(10) "(ab(cd)ef)" } [1]=> array(1) { [0]=> string(8) "ab(cd)ef" } [2]=> array(1) { [0]=> string(2) "ef" } } array(1) { [0]=> string(4) "(cd)" }
Output for 4.3.2 - 4.3.3
Fatal error: Call to undefined function: mb_ereg() in /in/CLQQc on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: mb_ereg() in /in/CLQQc on line 4

preferences:
213.87 ms | 401 KiB | 310 Q