3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = 'Hello'; $string .= ' world'; echo $string;
Output for 7.1.25 - 7.1.27, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.26, 8.1.0 - 8.1.13
Hello world

preferences:
22.47 ms | 410 KiB | 5 Q