3v4l.org

run code in 500+ PHP versions simultaneously
<?php try { $a[(object)null] = 1; } catch (Throwable $e) { print_r($e->getTrace()); } try { file(null); } catch (Throwable $e) { print_r($e->getTrace()); } try { file(); } catch (Throwable $e) { print_r($e->getTrace()); }

preferences:
23.29 ms | 476 KiB | 4 Q