3v4l.org

run code in 500+ 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 - 8.1.34, 8.2.0 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.7
int(1) int(42)
preferences:
94.12 ms | 1124 KiB | 4 Q