[PHP] Url encryptor

URLEncryptor.php

<?php
/* Function: ImageURLEncryption
*  Parameters: 
*     $Url : the url or text that you want to encrypt.
*     $Code: the magic code which masks the url. 
*/
function ImageURLEncryption($Url,$Code)
{
	$SecretCode = md5($Code);
	
	
	
	$StringLength = strlen($Url);
	$SecretCodeLength = strlen($SecretCode);

	for( $Index =$StringLength %2; $Index < $StringLength; $Index+=2)
	{
		$Url[$Index] = chr(ord($Url[$Index])^ord($SecretCode[$Index%$SecretCodeLength]));
	}
	$Url = base64_encode($Url);
	return $Url;
}

/* Function: ImageURLDecryption
*  Parameters: 
*     $EncryptedUrl : the encrypted url or text that you want to decrypt.
*     $Code: the magic code which unmasks the url. 
*/
function ImageURLDecryption($EncryptedUrlCode,$Code)
{
	$SecretCode = md5($Code);
	$EncryptedUrlCode=base64_decode($EncryptedUrlCode);
	$SecretCodeLength = strlen($SecretCode);
	$StringLength = strlen($EncryptedUrlCode);	
	for($Index = $StringLength %2; $Index < $StringLength; $Index +=2)
	{
		$EncryptedUrlCode[$Index] = chr(ord($EncryptedUrlCode[$Index])^ord($SecretCode[$Index%$SecretCodeLength]));
	}
	return $EncryptedUrlCode;
}

?>