I'm playing around with encrypt/decrypt coding in php. Interesting stuff!
However, I'm coming across some issues involving what text gets encrypted into.

Here's 2 functions that encrypt and decrypt a string. It uses an Encryption Key, which I set as something obscure. I actually got this from a php book. I modified it slightly, but not to change it's main goal.

I created a small example below that anyone can test.
But, I notice that some characters show up as the "encrypted" string. Characters like "=" and "+". Sometimes I pass this encrypted string via the url. Which may not quite make it to my receiving scripts. I'm guessing the browser does something to the string if certain characters are seen. I'm really only guessing.

Ben tarayıcı dize değmeyecek sağlamak için kullanabileceğiniz başka bir işlevi var mı? ya da kimse kullanılan bazı karakterleri engellemek için yeterli php bas64_encode () biliyor mu? Ben gerçekten bir olasılık olarak ikinci beklemek gitmiyorum. Ama, ben bir iş çevresinde vardır eminim.

kodunu zevk, herkese ihtiyacı!

define('ENCRYPTION_KEY', "sjjx6a"); 

function encrypt($string) {

  $result = '';
  for($i=0; $i<strlen($string); $i++) {
    $char = substr($string, $i, 1);
    $keychar = substr(ENCRYPTION_KEY, ($i % strlen(ENCRYPTION_KEY))-1, 1);
    $char = chr(ord($char)+ord($keychar));
    $result.=$char;
  }
  return base64_encode($result)."/".rand();
}

function decrypt($string){
    $exploded = explode("/",$string);
    $string = $exploded[0];
  $result = '';
  $string = base64_decode($string);
  for($i=0; $i<strlen($string); $i++) {
    $char = substr($string, $i, 1);
    $keychar = substr(ENCRYPTION_KEY, ($i % strlen(ENCRYPTION_KEY))-1, 1);
    $char = chr(ord($char)-ord($keychar));
    $result.=$char;
  }

  return $result;
}

echo $encrypted = encrypt("reaplussign.jpg");
echo "<br>";
echo decrypt($encrypted);