php简单异或运算|php 简单异或|php异或|php xor

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<?php

function getXOR($data, $key, $string = &#39;&#39;){
		$len = strlen($data);
		$len2 = strlen($key);
		for($i = 0; $i < $len; $i ++){
			$j = $i % $len2;
			$string	.= ($data[$i]) ^ ($key[$j]);
		}	
		return $string;
}


$data = &#39;this is a #test@ string&#39;;
$key = &#39;thisakey&#39;;



$f = getXOR($data, $key);
echo $f;
$s = getXOR($f, $key);
print_r($s);