3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace foo; var_dump(strlen('x')); if (true) { function strlen($x) { return 42; } } var_dump(strlen('x'));
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(1) int(42)
preferences:
96.91 ms | 402 KiB | 89 Q