Simple encryption in PHP

Question

I\'m building a with-source system which I am giving out on the \'net for providing adoptable virtual pets. The system will be owned mainly by kids. Since I want it to be us

Answer 1

You are looking for "one time padding" encryption. It takes a key and does modulus addition to characters to create the encrypted string.

function ecrypt($str){
  $key = "abc123 as long as you want bla bla bla";
  for($i=0; $i

So that's simple string encryption. What I would do is serialize the array of the user's parameters and pass it as a variable in the link:

$arr = array(
  'pet_name'=>"fido",
  'favorite_food'=>"cat poop",
  'unique_id'=>3848908043
);
$param_string = encrypt(serialize($arr));

$link = "/load_pet.php?params=$param_string";

In load_pet.php you should do the opposite:

$param_string = $_GET["params"];
$params = unserialize(decrypt($param_string));

Bam.