if security isn't an issue, and you just want to make something a little harder to read (for example, sending secret messages in image headers hehe) well, here you go.<?php

#######################################
# notepads uber 1337 encryption codez #
#######################################

$text = 'A secret.';

if(!isset($chars))
{
// 3 different symbols (or combinations) for obfuscation
// these should not appear within the original text
$sym = array('¶', '¥xQ', '|');

foreach(range('a','z') as $key=>$val)
$chars[$val] = str_repeat($sym[0],($key + 1)).$sym[1];
$chars[' '] = $sym[2];

unset($sym);
}

// encrypt
function encrypt($data)
{
$data = strtr(strtolower($data), $GLOBALS['chars']);
return $data;
}

// decrypt
function decrypt($data)
{
$charset = array_flip($GLOBALS['chars']);
$charset = array_reverse($charset, true);

$data = strtr($data, $charset);
unset($charset);
return $data;
}

$text = encrypt($text);
echo 'encrypted: '.$text.'<br />';
// echo 'decrypted: '.decrypt($text);

?>

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