3v4l.org

run code in 300+ PHP versions simultaneously
<?php function readonly() { } $var = readonly ();
Output for 7.4.0 - 7.4.33, 8.0.1 - 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
preferences:
89.73 ms | 1224 KiB | 4 Q