Simple password generator
I have notes from 2010, but the original forum post is no longer available. I *think* I tried it, but can't be sure.
WAS: $_REQUEST['password'] = substr(md5(uniqid(rand(), true)), 15); FOR 4-CHARACTER PASSWORD, CHANGED TO: $_REQUEST['password'] = substr(md5(uniqid(rand(), true)),0, 4);
Not only was the '15' changed to '4', but the '0,' was also added in front of it.
Hope that works for you.
You can see that the code snippet Deborah provided has md5 in it, which means the password returned is encrypted. That's what you will want when you're saving the password into the database. If you removed the md5 from the snippet, you would see 4 purely numeric values being returned.
Here's an example of a password being generated without the hash: 1197.