How to generate a unique image name like in vk.com?

Question

PHP

Using php, I need to generate a unique name for the image like in vk.com. For example, such kqE5rJR7GTs.jpg
Now I generate based on the current time, but I would like to see more options.

Answer 1

Yes, just a string of random characters - large, small letters and numbers, and for reinsurance, you can check whether it turned out to be unique, if not, then generate it again.

Answer 2

PHP has a uniqid() function

Answer 3

php.net/manual/en/function.random-bytes.php

Answer 4

SHA1(md5-сумма файла + MD5(текущее время)).

Answer 5

Как вариант, воспользоватся Hashids. Выглядит как случайная строка, но ее можно декодировать в числа (массив например, [1, 2, 3]). Удобно если нужна связь с БД.

Answer 6

Take the id from the database. It's enough.