What is the kind that they use in their short urls?
The kind where instead of being just numbers, they increment in things like: 7Hna7z
and that. I'm just starting to get into programming and I was thinking on doing that for a project. I just need a name or something to google it, or if anybody has a PHP or MySQL tutorial onto how to do it I would appreciate it greatly.
Thanks.
It's just an alphanumeric key that has been generated. It's guaranteed to be unique. In PHP, this can be a uniqID. You can see the documentation for more info: http://php.net/manual/en/function.uniqid.php