PHP uses des to encrypt and decrypt the method to explain _php skills

Des is a standard data encryption algorithm, the detailed introduction of this algorithm can refer to Wiki and Baidu Encyclopedia:

Wiki Encyclopedia Baidu Encyclopedia

PHP has an extension to support DES encryption algorithm, is:extension=php_mcrypt.dll

Opening this extension in a configuration file cannot be used in a Windows environment

You need to copy the Libmcrypt.dll under the PHP folder to the System32 directory of the system, which is phpinfo to see mcrypt that the module can be tested properly.

The following is an example of using DES encryption for decryption in PHP:

Copy Code code as follows:

$input-stuff to decrypt
$key-the secret key to use

function Do_mencrypt ($input, $key)
{
$input = Str_replace ("" N "," ", $input);
$input = Str_replace ("T", "", $input);
$input = Str_replace ("R", "", $input);
$key = substr (MD5 ($key), 0, 24);
$TD = Mcrypt_module_open (' TripleDES ', ', ', ' ECB ', ');
$iv = Mcrypt_create_iv (Mcrypt_enc_get_iv_size ($TD), Mcrypt_rand);
Mcrypt_generic_init ($TD, $key, $IV);
$encrypted _data = Mcrypt_generic ($TD, $input);
Mcrypt_generic_deinit ($TD);
Mcrypt_module_close ($TD);
Return Trim (Chop (Base64_encode ($encrypted _data)));
}

$input-stuff to decrypt
$key-the secret key to use

function Do_mdecrypt ($input, $key)
{
$input = Str_replace ("" N "," ", $input);
$input = Str_replace ("T", "", $input);
$input = Str_replace ("R", "", $input);
$input = Trim (Chop (Base64_decode ($input));
$TD = Mcrypt_module_open (' TripleDES ', ', ', ' ECB ', ');
$key = substr (MD5 ($key), 0, 24);
$iv = Mcrypt_create_iv (Mcrypt_enc_get_iv_size ($TD), Mcrypt_rand);
Mcrypt_generic_init ($TD, $key, $IV);
$decrypted _data = Mdecrypt_generic ($TD, $input);
Mcrypt_generic_deinit ($TD);
Mcrypt_module_close ($TD);
Return Trim (Chop ($decrypted _data));

}