Since you opened your mouth about $unmd5().
Only post about things you know about, unless asking a question. Since MD5 cannot be reversed, your assumption that somebody probably already has makes you look very foolish indeed.
MD5 (and CRC) are simply a hashes (fingerprints) of a string, using complex math and pre-defined 128 bit values for each of the 256 ASCII characters. Like a real fingerprint, it doesn't contain real information about the person (eg: height, gender, hair color, etc)... but you can tell if you have the right person by looking at their finger and comparing their fingerprint.
Because there are an infinite number of possible words/phrases/novels of information that can be fingerprinted with $md5, it would be impossible to guess (decode) the actuall string passed.
- Raccoon
