3v4l.org

run code in 500+ PHP versions simultaneously
<?php $string = "Welcome to Lorien."; $search = "welcome"; $result = preg_replace("/{$search}/i", '<b>$0</b>', $string); print_r($result);
Output for 7.1.25 - 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
<b>Welcome</b> to Lorien.
preferences:
86.52 ms | 1486 KiB | 4 Q