PHP如何使用密钥对文本进行编码/解码？

代码：

它编码为

$string

。但是如何解码

$result

---

请告诉我如何解码

$result

？

注意：从PHP 7.1.0开始，此函数已被弃用。不鼓励依赖此功能。

尝试使用MCRYPT_解密

$result = mcrypt_ecb (MCRYPT_3DES, 'test', $string, MCRYPT_ENCRYPT);

解密：

$result = mcrypt_ecb (MCRYPT_3DES, 'test', $string, MCRYPT_ENCRYPT);

$decrypted_text = mcrypt_ecb(MCRYPT_DES, 'test', $result, MCRYPT_DECRYPT);
echo rtrim($decrypted_text);

您需要更改参数中的模式并传递加密值

注意：从PHP 7.1.0开始，mcrypt_generic（）也被弃用。

阅读手册：

最好使用

$cc='my secret text'；
$key='my secret key'；
$iv='12345678'；
$cipher=mcrypt_模块_打开（mcrypt_河豚，，'cbc'，''；
mcrypt_generic_init（$cipher，$key，$iv）；
$encrypted=mcrypt_generic（$cipher，$cc）；
mcrypt_generic_deinit（$cipher）；
mcrypt_generic_init（$cipher，$key，$iv）；
$decrypted=mdecrypt_generic（$cipher，$encrypted）；
mcrypt_generic_deinit（$cipher）；
echo“加密：”.$加密；
回声“
”；
echo“已解密：”.$已解密；

您应该在ecb模式isntead中使用mcrypt\u encrypt。mcrypr_欧洲央行被抹黑了

要解密它，您可以使用：mcrypt_decrypt

请参阅

简单的PHP使用来自Joashp的OpenSSL加密和解密，Joashp将为食物工作

$cc = 'my secret text';
$key = 'my secret key';
$iv = '12345678';

$cipher = mcrypt_module_open(MCRYPT_BLOWFISH,'','cbc','');

mcrypt_generic_init($cipher, $key, $iv);
$encrypted = mcrypt_generic($cipher,$cc);
mcrypt_generic_deinit($cipher);

mcrypt_generic_init($cipher, $key, $iv);
$decrypted = mdecrypt_generic($cipher,$encrypted);
mcrypt_generic_deinit($cipher);

echo "encrypted : ".$encrypted;
echo "<br>";
echo "decrypted : ".$decrypted;

---

改用PHP LibNade。你可以查一下进一步的解释

例如：

/**
 * simple method to encrypt or decrypt a plain text string
 * initialization vector(IV) has to be the same when encrypting and decrypting
 * 
 * @param string $action: can be 'encrypt' or 'decrypt'
 * @param string $string: string to encrypt or decrypt
 *
 * @return string
 */
function encrypt_decrypt($action, $string) {
    $output = false;
    $encrypt_method = "AES-256-CBC";
    $secret_key = 'This is my secret key';
    $secret_iv = 'This is my secret iv';
    // hash
    $key = hash('sha256', $secret_key);

    // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
    $iv = substr(hash('sha256', $secret_iv), 0, 16);
    if ( $action == 'encrypt' ) {
        $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);
        $output = base64_encode($output);
    } else if( $action == 'decrypt' ) {
        $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);
    }
    return $output;
}
$plain_txt = "This is my plain text";
echo "Plain Text =" .$plain_txt. "\n";
$encrypted_txt = encrypt_decrypt('encrypt', $plain_txt);
echo "Encrypted Text = " .$encrypted_txt. "\n";
$decrypted_txt = encrypt_decrypt('decrypt', $encrypted_txt);
echo "Decrypted Text =" .$decrypted_txt. "\n";
if ( $plain_txt === $decrypted_txt ) echo "SUCCESS";
else echo "FAILED";
echo "\n";

---

此函数已弃用，不应再使用。您可能想改用。您是如何发现这种加密方法的？使用同样的方法找到解密方法，如果它存在，请用实际方法编码/解码来写答案？是的，我看到了-这是一个很好的答案-但是我看到

这个函数已经被弃用了
，你能用编码/解码的功能来写答案吗？注意：mcrypt\u generic（）从PHP 7.1.0开始，它也被弃用了。你能在mcrypt_encrypt/mcrypt_decrypt上用encode/decode写答案吗？非常简单的解决方案，我曾经在公式隐藏字段中加密电子邮件，然后在发送时解密！
/**
 * simple method to encrypt or decrypt a plain text string
 * initialization vector(IV) has to be the same when encrypting and decrypting
 * 
 * @param string $action: can be 'encrypt' or 'decrypt'
 * @param string $string: string to encrypt or decrypt
 *
 * @return string
 */
function encrypt_decrypt($action, $string) {
    $output = false;
    $encrypt_method = "AES-256-CBC";
    $secret_key = 'This is my secret key';
    $secret_iv = 'This is my secret iv';
    // hash
    $key = hash('sha256', $secret_key);

    // iv - encrypt method AES-256-CBC expects 16 bytes - else you will get a warning
    $iv = substr(hash('sha256', $secret_iv), 0, 16);
    if ( $action == 'encrypt' ) {
        $output = openssl_encrypt($string, $encrypt_method, $key, 0, $iv);
        $output = base64_encode($output);
    } else if( $action == 'decrypt' ) {
        $output = openssl_decrypt(base64_decode($string), $encrypt_method, $key, 0, $iv);
    }
    return $output;
}
$plain_txt = "This is my plain text";
echo "Plain Text =" .$plain_txt. "\n";
$encrypted_txt = encrypt_decrypt('encrypt', $plain_txt);
echo "Encrypted Text = " .$encrypted_txt. "\n";
$decrypted_txt = encrypt_decrypt('decrypt', $encrypted_txt);
echo "Decrypted Text =" .$decrypted_txt. "\n";
if ( $plain_txt === $decrypted_txt ) echo "SUCCESS";
else echo "FAILED";
echo "\n";

$msg = 'This is a super secret message!';

// Generating an encryption key and a nonce
$key   = random_bytes(SODIUM_CRYPTO_SECRETBOX_KEYBYTES); // 256 bit
$nonce = random_bytes(SODIUM_CRYPTO_SECRETBOX_NONCEBYTES); // 24 bytes

// Encrypt
$ciphertext = sodium_crypto_secretbox($msg, $nonce, $key);
// Decrypt
$plaintext = sodium_crypto_secretbox_open($ciphertext, $nonce, $key);

echo $plaintext === $msg ? 'Success' : 'Error'