What are some alternatives to click protection methods in PHP that do not involve Java or JavaScript?

Click protection methods in PHP are essential to prevent users from clicking on a button or link multiple times, which can lead to duplicate submissions or unintended actions. One alternative to using Java or JavaScript for click protection is to utilize PHP sessions to track and prevent multiple clicks within a specified timeframe. By setting a session variable upon form submission and checking its value before processing the form, you can effectively prevent multiple submissions without relying on client-side scripting.

session_start();

if(isset($_POST['submit'])) {
    if(!isset($_SESSION['submitted'])) {
        // Process form submission
        $_SESSION['submitted'] = true;
    } else {
        // Display error message or redirect to prevent multiple submissions
    }
}