3v4l.org

run code in 300+ PHP versions simultaneously
<?php $result = ''; echo "\0"; echo NULL; echo "a"; for ($t=0; $t<128; $t++) $result .= "\\".chr($t); echo "strlen = ".strlen($result)."\n"; echo "Result = ".$result."\n";

preferences:
40.6 ms | 402 KiB | 5 Q