Is it advisable to use pre-made scripts for PHP login systems, or is it better to write custom code?

Using pre-made scripts for PHP login systems can be a time-saving option, especially for beginners or for projects with tight deadlines. However, using custom code allows for more control over security measures and customization options. It ultimately depends on the specific requirements of the project and the level of expertise of the developer.

// Example of a custom PHP login system

// Check if form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Validate user input
    $username = $_POST["username"];
    $password = $_POST["password"];
    
    // Check username and password against database
    // If valid, set session variables and redirect to dashboard
    // If invalid, display error message
}