<?php
function getXOR($data, $key, $string = ''){
$len = strlen($data);
$len2 = strlen($key);
for($i = 0; $i < $len; $i ++){
$j = $i % $len2;
$string .= ($data[$i]) ^ ($key[$j]);
}
return $string;
}
$data = 'this is a #test@ string';
$key = 'thisakey';
$f = getXOR($data, $key);
echo $f;
$s = getXOR($f, $key);
print_r($s);
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