PHP对称加密解密方法

/** * 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 <= $strCount ?&& isset($strArr[$key]) && $strArr[$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();