Fonctions similaires base64_encode/decode

 function encrypt($data) {
    $key = "secret";  // Clé de 8 caractères max
    $data = serialize($data);
    $td = mcrypt_module_open(MCRYPT_DES,"",MCRYPT_MODE_ECB,"");
    $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
    mcrypt_generic_init($td,$key,$iv);
    $data = base64_encode(mcrypt_generic($td, '!'.$data));
    mcrypt_generic_deinit($td);
    return $data;
}
 
function decrypt($data) {
    $key = "secret";
    $td = mcrypt_module_open(MCRYPT_DES,"",MCRYPT_MODE_ECB,"");
    $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
    mcrypt_generic_init($td,$key,$iv);
    $data = mdecrypt_generic($td, base64_decode($data));
    mcrypt_generic_deinit($td);
 
    if (substr($data,0,1) != '!')
        return false;
 
    $data = substr($data,1,strlen($data)-1);
    return unserialize($data);
}