Decryptage code

index.php

<?php

function decryptCode($text)
{
    $keyNumber = strlen($text) / 2;

    $subString = substr($text, 5, $keyNumber);

    $stringWitoutSpace = str_replace("@#?", " ", $subString);

    echo strrev($stringWitoutSpace)." ";
}

decryptCode("0@sn9sirppa@#?ia'jgtvryko1");
decryptCode("q8e?wsellecif@#?sel@#?setuotpazdsy0*b9+mw@x1vj");
decryptCode("aopi?sgnirts@#?sedhtg+p9l!");