3v4l.org

run code in 300+ PHP versions simultaneously
<?php $start = '@'; $end = '@'; $text = 'newtext!234@@random_text@@weludud'; $replace = 'test'; $msg = preg_replace('#('.$start.')(.*)('.$end.')#si', "$1$replace$3", $text); echo $msg;
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.21, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
newtext!234@test@weludud

preferences:
229.55 ms | 405 KiB | 321 Q