Generating a random string in PHP: how to do it correctly and securely?

Hello everyone! I'm a beginner PHP developer writing my first site with user registration. I need to generate random tokens for email confirmation and temporary passwords. I found a simple method online, but I'm not sure it's correct. Here's what I'm currently using: ```php function generateRandomString($length = 10) { $characters = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'; $charactersLength = strlen($characters); $randomString = ''; for ($i = 0; $i < $length; $i++) { $randomString .= $characters[rand(0, $charactersLength - 1)]; } return $randomString; } echo generateRandomString(32); // Example: "a3F8kL9mN2..." ``` Problems I see: 1. The `rand()` function — I've read that it's not cryptographically secure. 2. No guarantee