If you're using passwords of any type on your site, it is best to keep them random. That way they cannot be easily guessed at by intruders.

First, it's good to know a little about ASCII characters. Every character your keyboard can type is actually represented by a number. So the letter A is represented by 65. The letter Z is represented by 90. So all you need to do is generate a series of random numbers, each number between 65 and 90. That would give you a way to find the equivalent letters.

If you want to include numbers too, those are found between spots 48 and 57. I wouldn't use the spots between 57 and 65 - those are odd characters like colons.




So let's say you want to create a 7 character password that contains a random assortment of letters and numbers. You could do something like this:

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