3v4l.org

run code in 300+ PHP versions simultaneously
<?php $str = 'foo {{bar}} foo {{bar}} foo'; $bar = ['lol','kek']; $res = preg_replace_callback('/{{bar}}/', function($m) use (&$bar) { return array_shift($bar); }, $str); echo $res;
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
foo lol foo kek foo

preferences:
142.7 ms | 403 KiB | 212 Q