3v4l.org

run code in 300+ PHP versions simultaneously
<?php $re = '/(?:\[[^][]*]|\([^()]*\)|{[^{}]*})(*SKIP)(*F)|[^][(){}]+/m'; $str = 'Hello [123] {45} world (67) Hello There (8) [9] {0}'; $result = preg_replace($re, '', $str); echo $result;
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.29, 8.2.0 - 8.2.23, 8.3.0 - 8.3.11
[123]{45}(67)(8)[9]{0}

preferences:
51.65 ms | 407 KiB | 5 Q