3v4l.org

run code in 300+ PHP versions simultaneously
<?php (new class { private $recursion = 0; // just so we don't abuse 3v4l function __invoke() { echo "all by myself...", PHP_EOL; $this->recursion++; sleep(1); if($this->recursion < 3) $this(); } })();
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
all by myself... all by myself... all by myself...
Process exited with code 137.
Output for 5.4.2 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
Parse error: syntax error, unexpected 'class' (T_CLASS) in /in/ukuBg on line 3
Process exited with code 255.
preferences:
220.82 ms | 402 KiB | 225 Q