~~~ $content = "12312312"; $key = "key"; /** * 簡單對稱加密算法之加密 * @param String $string 需要加密的字串 * @param String $skey 加密EKY * @return String */ function encode($string = '', $skey) { $strArr = str_split(base64_encode($string)); $strCount = count($strArr); foreach (str_split($skey) as $key => $value) $key < $strCount && $strArr[$key].=$value; return str_replace(array('=', '+', '/'), array('huihui', 'HUIHUI', 'HuiHii'), join('', $strArr)); } /** * 簡單對稱加密算法之解密 * @param String $string 需要解密的字串 * @param String $skey 解密KEY * @return String */ function decode($string = '', $skey ) { $strArr = str_split(str_replace(array('huihui', 'HUIHUI', 'HuiHii'), 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 "string : " . $content . " <br />"; echo "encode : " . ($enstring = encode($content,$key)) . '<br />'; echo "decode : " . decode($enstring,$key); exit(); ~~~