3v4l.org

run code in 300+ PHP versions simultaneously
<?php function fdopen($id, $mode) { return fopen("/proc/self/fd/".(int)$id, $mode); } $stdin = fopen('php://stdin', 'r'); echo $stdin; for ($i = 1; $i <= 10; $i++) { echo $i; } echo STDIN;

preferences:
45.39 ms | 402 KiB | 5 Q