php加密网站uid等id？

为了防止用户查看别的用户的数据，站长们后端做鉴权，还要加密 uid今天说的就是加密uid。

  鉴权 这些，例如： $_SESSION['uid'] 里，每次请求的时候判断 $_GET['uid'] == $_SESSION['uid'] 是否为真。

php加密网站uid

// 設定金鑰, 負責對資料進行加解密
    $key = "ac181c517bdf24ce053556bb280a2dcb";

    /**
     * 加密函數
     */
 function encrypt($str)
 {
  $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
  $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
  return base64_encode(trim(mcrypt_encrypt(MCRYPT_RIJNDAEL_128, self::$key, $str, MCRYPT_MODE_ECB, $iv)));
 }

      /**
     * 解密函數
     */
 function decrypt($str)
 {
  $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
  $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
  return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_128, self::$key, base64_decode($str), MCRYPT_MODE_ECB, $iv));
 }

或者是权限判断的功能,比如根据cookie识别用户.

加/解密可以用OpenSSL AES: 

header('Content-Type: text/plain;charset=utf-8');
$data = 'phpbest';
$key = 'oScGU3fj8m/tDCyvsbEhwI91M1FcwvQqWuFpPoDHlFk='; //echo base64_encode(openssl_random_pseudo_bytes(32));
$iv = 'w2wJCnctEG09danPPI7SxQ=='; //echo base64_encode(openssl_random_pseudo_bytes(16));
echo '内容: '.$data."\n";

$encrypted = openssl_encrypt($data, 'aes-256-cbc', base64_decode($key), OPENSSL_RAW_DATA, base64_decode($iv));
echo '加密: '.base64_encode($encrypted)."\n";

$encrypted = base64_decode('To3QFfvGJNm84KbKG1PLzA==');
$decrypted = openssl_decrypt($encrypted, 'aes-256-cbc', base64_decode($key), OPENSSL_RAW_DATA, base64_decode($iv));
echo '解密: '.$decrypted."\n";

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