3v4l.org

run code in 300+ PHP versions simultaneously
<?php function encrypt($crypt){ $c=$b=$a=array(); $d=array('?', '(' , '@' , ';' , '$','#',']','&','*'); $d=array_merge(range($d,'a','z'),range('A','Z'),range(0,9)); $d=array_merge($d,array('!',')','_','+','|','%','/','[','.',' ') ); $e=9;$f=0; for(;$f<$e;$f++) { for($g=0;$g<$e;$g++){ $b[$f][$g]=$d[$f*$e+$g]; $a[$f][$g]=str_rot13($d[($e*$e-1)-($f*$e+$g)]); //$35 } } } ?>

preferences:
57.21 ms | 402 KiB | 5 Q