In this solution, you will learn how to generate a random, unique, alphanumeric string in PHP.
solution 1.
PHP 7 standard library provides the random_bytes() function that generates cryptographically secure pseudo-random bytes.
$bytes = random_bytes(20);
var_dump(bin2hex($bytes));The above example will output something similar to:
string(40) "5fe69c95ed70a9869d9f9af7d8400a6673bb9ce9"More info here
solution 2.
A quick, short, and to-the-point answer is:
bin2hex(openssl_random_pseudo_bytes($bytes))Which will generate a random string of alphanumeric characters of length = $bytes * 2. Unfortunately, this only has an alphabet of [a-f][0-9], but it works.
