This is a keyless encrypt/decrypt algorithm for plain text.
<?php
$text = "follow the white rabbit...";
$myCrypt = new GHCrypt();
$encrypt = $myCrypt -> enstring($text);
$decrypt = $myCrypt -> destring($encrypt);
echo "Plain-text: ".$text."\n";
echo "Crypted: ".$encrypt."\n";
echo "Decrypted: ".$decrypt."\n";
unset($myCrypt);
?>
The result after two runs: