3v4l.org

run code in 500+ PHP versions simultaneously
<?php class A { public function __construct($arg = NULL) { print func_num_args()."\n"; } } new A(); new A(NULL);
Output for 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
0 1
preferences:
68.27 ms | 971 KiB | 4 Q