Use wp_rand()

[jrfnl]

wp_rand() is a less predictable replacement for the PHP native rand() and mt_rand() functions.

Refs:

• https://developer.wordpress.org/reference/functions/wp_rand/
• https://www.php.net/manual/en/function.mt-rand.php
• https://www.php.net/manual/en/function.rand.php