class SysCrypt{
 private $crypt_key='http://www.';//密钥
 public function __construct($crypt_key){
  $this->crypt_key=$crypt_key;
 }
 public function encrypt($txt){
  srand((double)microtime()*1000000);
  $encrypt_key=md5(rand(0,32000));
  $ctr=0;
  $tmp='';
  for($i=0;$icrypt_key));
 }
 public function decrypt($txt){
  $txt=self::__key(base64_decode($txt),$this->crypt_key);
  $tmp='';
  for($i=0;$iencrypt($text);
echo '原文：',$text;
echo '
';
echo '密文：',$test1;
echo "
";
echo '解密：',$sc->decrypt($test1);