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Title : Customizable encoding and decoding strings with security.
Version: 1.0.0
Author: Mian Shafiq-ur-Rehman
Email : gurru@phpgurru.com
Mess : rehmanms@hotmail.com
Website: www.phpgurru.com
I have written two functions to encode and decode strings. This is very useful for setting username / passwords in cookies. The main advantage of encode function is that it generates different encoded string every time but decode function decode
the encoded string very intelligently. This will increase your security level of cookies data.
| <?php
function encode($originalStr)
{
$encodedStr = $originalStr;
$num = mt_rand(1,6);
for($i=1;$i<=$num;$i++)
{
$encodedStr = base64_encode($encodedStr);
}
$seed_array = array('S','H','A','F','I','Q');
$encodedStr = $encodedStr . "+" . $seed_array[$num];
$encodedStr = base64_encode($encodedStr);
return $encodedStr;
}
function decode($decodedStr)
{
$seed_array = array('S','H','A','F','I','Q');
$decoded = base64_decode($decodedStr);
list($decoded,$letter) = split("\+",$decoded);
for($i=0;$i<count($seed_array);$i++)
{
if($seed_array[$i] == $letter)
break;
}
for($j=1;$j<=$i;$j++)
{
$decoded = base64_decode($decoded);
}
return $decoded;
}
?> | |
Usage Example
| <?php
$orgStr = "www.phpgurru.com";
$decodedStr = encode($orgStr);
echo $decodedStr;
// this will output a long string like V2tST2EwMHdlSFZSYlRscVVqSlJlRmt5TlV0TlZYaDBWRzVhYVZWVU1Eaz0rRg==
// This will output the original string www.phpgurru.com
echo decode($decodedStr);
?> | |
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