Random Key Generator

I have stitched together a small PHP script on my step-brothers webserver. The script I have created is a key generator, so I decided to open it up to the public. It is also extremely simple to use.

When creating a key, you only need to input a single variable, the length. The length can be as high as you want, but keep in mind that the web server will only allow up to 30 seconds for a script to be executed so it may timeout when using crazy lengths. Below is a few examples:

http://cdel.me/keygen.php?length=<value>
http://cdel.me/keygen.php?length=100
http://cdel.me/keygen.php?length=1000000000000

So it's a random string/key/text generator? Pretty useless given the fact that it requires internet connection and that generating a key in your computer would be a lot faster. But, this place is not for some useful stuff, it's for stuff that people make and want to share. The generator looks very good, I like that you've put a maximum script execution timer. To make this even better, how about letting the user decide what characters they want? After you do that, how about patterns? For example, this pattern:

%w%w%w-%d%d-%w%w%d%d

could generate these strings:

ldg-90-ks73
kfy-46-oq76
mst-21-nt83

MKlegoman357, on 02 July 2015 - 12:42 PM said:

So it's a random string/key/text generator? Pretty useless given the fact that it requires internet connection and that generating a key in your computer would be a lot faster. But, this place is not for some useful stuff, it's for stuff that people make and want to share. The generator looks very good, I like that you've put a maximum script execution timer. To make this even better, how about letting the user decide what characters they want? After you do that, how about patterns? For example, this pattern:

%w%w%w-%d%d-%w%w%d%d

could generate these strings:

ldg-90-ks73
kfy-46-oq76
mst-21-nt83

Yeah, I just felt like sharing. :P/> :D/>
Patterns seem like an excellent idea, i'll add them as an argument similar to how you input length. Thank you for the suggestion!

Is there anything to stop any value being generated more than once? If yes, you could use this for something.