How to get unique file name on every http request in php

Question

I have to create new file on every http request and I want file name should be unique so that no file overwrite other files

Answer 1

first you need to create function to generate an unique value. here is the code for that function.

function gen_uuid() {
    return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
        mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
        mt_rand( 0, 0xffff ),
        mt_rand( 0, 0x0fff ) | 0x4000,
        mt_rand( 0, 0x3fff ) | 0x8000,
        mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff )
    );
}

Now call the above function for unique name. suppose your file extension should be .txt . then-

$ext = '.txt';
$fileName = gen_uuid().$ext;

that will gives you an unique name every time. you can also use the same function for generating UUID .