PHP实现简单对称加密

/**
* 简单对称加密算法之加密
* @param String $string 需要加密的字串
* @param String $skey 加密EKY
* @author Anyon Zou <zoujingli@qq.com>
* @date 2013-08-13 19:30
* @update 2014-10-10 10:10
* @return String
*/
function encode($string = "", $skey = 'cxphp') {
$strArr = str_split(base64_encode($string));
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key < $strCount && $strArr[$key].=$value;
return str_replace(array('=', '+', '/'), array('O0O0O', 'o000o', 'oo00o'), join($strArr));
}
/**
* 简单对称加密算法之解密
* @param String $string 需要解密的字串
* @param String $skey 解密KEY
* @author Anyon Zou <zoujingli@qq.com>
* @date 2013-08-13 19:30
* @update 2014-10-10 10:10
* @return String
*/
function decode($string = "", $skey = 'cxphp') {
$strArr = str_split(str_replace(array('O0O0O', 'o000o', 'oo00o'), array('=', '+', '/'), $string), 2);
$strCount = count($strArr);
foreach (str_split($skey) as $key => $value)
$key <= $strCount && $strArr[$key][1] === $value && $strArr[$key] = $strArr[$key][0];
return base64_decode(join($strArr));
}
echo '<pre>';
$str = '56,15123365247,54,四大古典风格';
echo "string : " . $str . " <br />";
echo "encode : " . ($enstring = encode($str)) . '<br />';
echo "decode : " . decode($enstring);
die();

 

输出结果

string : 56,15123365247,54,四大古典风格 
encode : NcTxYpshMpTUxMjMzNjUyNDcsNTQs5Zub5aSn5Yo000ok5YW46aOO5qC8
decode : 56,15123365247,54,四大古典风格