I'm trying to create a PHP sequential random character generator that will output to a file database of some sort. The randomization needs to be using both capital letters and numbers. I need to output like 2 million records. Can someone point me in the right direction on how to do this?
I'm also looking to to this without letters as well.
Thanks in advance, Steve
First of all, have you tried it? Pseudo-coded it? Here's one approach:
Check the decimal ranges of the ASCII table for the character set(s) you want. That will determine the limits of the random numbers you will accept.
Start a loop, the number of iterations equal to the length of the string you want, calling rand() with the decimal limits you will accept.
Convert the output of rand() to a character using chr() and store it in your string.
Loop until the string is filled.
Search your database for the value of the string. If it's not found, which assures you of it's uniqueness, execute an INSERT or UPDATE, whichever is appropriate for what you're doing. (Alternately append to the end of a file if you are using a text file if that's what you are doing, but if you want to check for uniqueness you will have to read the file each time, v. slow.)
Clear the string and repeat. (Actually you could just overwrite the string.)
Do the above 2 million times. It's amazingly fast.
May we ask why you are doing this?
Regards - Miles Thompson
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