How can I prevent multiple form submissions in PHP?

To prevent multiple form submissions in PHP, you can use a token or a session variable to track whether the form has already been submitted. When the form is submitted, you can check if the token or session variable exists and if it does, prevent the form from being submitted again. This can help prevent duplicate form submissions and improve the user experience. 

session_start();

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

Keywords

form submission prevent PHP session token

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