3v4l.org

run code in 500+ PHP versions simultaneously
<?php $re = '/\b[a-z]+-[a-z]+\K\d:\d\d-\d\d:\d\duhr\b/'; $norm = 'mo-sa9:00-20:00uhr'; echo preg_replace($re, " 0$0", $norm);
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.21, 8.5.0 - 8.5.6
mo-sa 09:00-20:00uhr
preferences:
82.79 ms | 1248 KiB | 4 Q