~~~ $content = "大家好，我是中国人，你是谁"; /** * 简单对称加密算法之加密 * @param String $string 需要加密的字串 * @param String $skey 加密EKY * @return String */ function encode($string = '', $skey = 'wenzi') { $strArr = str_split(base64_encode($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 $skey 解密KEY * @return String */ function decode($string = '', $skey = 'wenzi') { $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>'; echo "string : " . $content . " <br />"; echo "encode : " . ($enstring = encode($content)) . '<br />'; echo "decode : " . decode($enstring); ~~~