1 $data = '123456';
 2 $openssl_method = 'AES-256-CBC';
 3 $openssl_iv_length = openssl_cipher_iv_length($openssl_method);
 4 $openssl_iv = openssl_random_pseudo_bytes($openssl_iv_length);
 5 $openssl_password = openssl_random_pseudo_bytes(16);
 6 
 7 echo '<pre>';
 8 // 加密
 9 $e = openssl_encrypt($data, $openssl_method, $openssl_password, 0, $openssl_iv);
10 echo  openssl_error_string ();
11 
12 //解密
13 $f = openssl_decrypt($e, $openssl_method, $openssl_password, 0, $openssl_iv);
14 echo  openssl_error_string ();
15 var_dump($e, $f);