3v4l.org

run code in 300+ PHP versions simultaneously
<?php $value = "1234 4569 "; var_dump(preg_match_all('[0-9]{4}', $value, $matches, PREG_SET_ORDER)); var_dump($matches);
Output for 5.3.28 - 5.3.29, 5.4.18 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 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
Warning: preg_match_all(): Unknown modifier '{' in /in/BRSEK on line 6 bool(false) NULL
Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.27, 5.4.0 - 5.4.17
Warning: preg_match_all(): Unknown modifier '{' in /in/GGhNK on line 6 bool(false) NULL
Output for 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: preg_match_all(): Unknown modifier '{' in /in/GGhNK on line 6 bool(false) array(0) { }
Output for 4.3.1 - 4.3.10
Warning: Unknown modifier '{' in /in/GGhNK on line 6 bool(false) array(0) { }
Output for 4.3.0
Warning: Unknown modifier '{' in /in/BRSEK on line 6 bool(false) array(0) { }

preferences:
219.17 ms | 401 KiB | 310 Q