Encrypt and Decrypt data in PHP

Hi Vineet,

For example of encrypt and decrypt the urls:

function encrypt($sData, $sKey='mysecretkey'){

$sResult = '';

for($i=0;$i

$sChar = substr($sData, $i, 1);

$sKeyChar = substr($sKey, ($i % strlen($sKey)) - 1, 1);

$sChar = chr(ord($sChar) + ord($sKeyChar));

$sResult .= $sChar;

}

return encode_base64($sResult);

}

function decrypt($sData, $sKey='mysecretkey'){

$sResult = '';

$sData = decode_base64($sData);

for($i=0;$i

$sChar = substr($sData, $i, 1);

$sKeyChar = substr($sKey, ($i % strlen($sKey)) - 1, 1);

$sChar = chr(ord($sChar) - ord($sKeyChar));

$sResult .= $sChar;

}

return $sResult;

}

function encode_base64($sData){

$sBase64 = base64_encode($sData);

return strtr($sBase64, '+/', '-_');

}

function decode_base64($sData){

$sBase64 = strtr($sData, '-_', '+/');

return base64_decode($sBase64);

}

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