jAw9AzfJ

1    function encode($appNumber)
2    {
3        $secretKey = md5("cc1fa18c99877f15f8c9f15169a710c8");
4        $value = "cid=85&external_reference=".$appNumber."&optional_identifier=";
5
6        return rtrim(
7            bin2hex(
8                mcrypt_encrypt(
9                    MCRYPT_RIJNDAEL_256,
10                    $secretKey,
11                    $value,
12                    MCRYPT_MODE_ECB,
13                    mcrypt_create_iv(
14                        mcrypt_get_iv_size(
15                            MCRYPT_RIJNDAEL_256,
16                            MCRYPT_MODE_CBC
17                        )
18                    )
19                )
20            ),
21            "\0"
22        );
23
24    }