3v4l.org

run code in 500+ PHP versions simultaneously
<?php $str = '123.23.23.4/17,'; $str .= '123.23.23.4/23,'; $str .= '123.23.23.4/8,'; $str .= '123.23.23.4/18'; preg_match_all("~/\K(?:[1-9]|[12][0-9]|3[01])\b~", $str, $matches); print_r($matches[0]);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.4, 8.3.6 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
Array ( [0] => 17 [1] => 23 [2] => 8 [3] => 18 )
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 Array ( [0] => 17 [1] => 23 [2] => 8 [3] => 18 )
preferences:
117.82 ms | 1391 KiB | 4 Q