3v4l.org

run code in 300+ PHP versions simultaneously
<?php $mem = fopen('php://temp', 'w'); fwrite($mem, '<?php echo "boo!\n"; $foo = "foo" $bar; foo();'); fclose($mem); try { require('php://temp'); } catch (throwable $e) { var_dump($e); }

preferences:
62.9 ms | 402 KiB | 5 Q