This is how I would do it. Create a class to do encryption/decryption:
class cipher
{
private $securekey;
private $iv_size;
function __construct($textkey)
{
$this->iv_size = mcrypt_get_iv_size(
MCRYPT_RIJNDAEL_128,
MCRYPT_MODE_CBC
);
$this->securekey = hash(
‘sha256‘,
$textkey,
TRUE
);
}
function encrypt($input)
{
$iv = mcrypt_create_iv($this->iv_size);
return base64_encode(
$iv . mcrypt_encrypt(
MCRYPT_RIJNDAEL_128,
$this->securekey,
$input,
MCRYPT_MODE_CBC,
$iv
)
);
}
function decrypt($input)
{
$input = base64_decode($input);
$iv = substr(
$input,
0,
$this->iv_size
);
$cipher = substr(
$input,
$this->iv_size
);
return trim(
mcrypt_decrypt(
MCRYPT_RIJNDAEL_128,
$this->securekey,
$cipher,
MCRYPT_MODE_CBC,
$iv
)
);
}
}
Then use it like this:
// Usage $cipher = new cipher(‘my-secret-key‘); $orignal_text = ‘my secret message‘; $encrypted_text = $cipher->encrypt($orignal_text); // store this in db $decrypted_text = $cipher->decrypt($encrypted_text); // load $encrypted_text from db // Debug echo "Orignal Text : $orignal_text\r\n"; echo "Encrypted Text: $encrypted_text\r\n"; echo "Decrypted Text: $decrypted_text";
This respectively outputs the following:
Orignal Text : my secret message Encrypted Text: Z21ifr5dHEdE9nO8vaDWb9QkjooqCK4UI6D/Ui+fkpmXWwmxloy8hM+7oimtw1wE Decrypted Text: my secret message
来源：http://stackoverflow.com/questions/26756322/php-using-mcrypt-and-store-the-encrypted-in-mysql
PHP using mcrypt and store the encrypted in MySQL
原文：http://www.cnblogs.com/wish123/p/5924139.html