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 } } } ?>
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.31, 7.1.0 - 7.1.23, 7.2.0 - 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

preferences:
210.09 ms | 404 KiB | 286 Q