3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [0, 1]; for($i = 0; $i < 10000; $i++) { $n = rand(0, 99) * rand(0, 99); $a[$n%2]++; } var_dump($a);

preferences:
34.44 ms | 402 KiB | 5 Q