3v4l.org

run code in 500+ PHP versions simultaneously
<?php $string = "Lorem ipsum random_5ac18d179707d dolor random_5ac18d179707d sit amet, consectetur random_5ac18decebd4e adipiscing elit. random_5ac18d179707d"; preg_match_all('~random_(\w+)~', $string, $m); echo strtr($string, array_combine($s = array_unique($m[1]), range(1, count($s))));
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
Lorem ipsum random_1 dolor random_1 sit amet, consectetur random_2 adipiscing elit. random_1
preferences:
27.95 ms | 1152 KiB | 7 Q