How can PHP sessions or cookies be utilized in a scenario where user input needs to be compared and confirmed before database submission?

When user input needs to be compared and confirmed before database submission, PHP sessions or cookies can be utilized to store the user input temporarily while the comparison is being made. Once the input is confirmed, it can be safely submitted to the database. This ensures that only valid data is stored in the database. 

<?php
session_start();

// Assuming form data is submitted via POST method
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Retrieve user input from the form
    $user_input = $_POST['user_input'];

    // Perform comparison/validation on user input
    if ($user_input == "valid_input") {
        // Store valid input in session
        $_SESSION['valid_input'] = $user_input;

        // Redirect to database submission page
        header("Location: submit_to_database.php");
        exit();
    } else {
        // Invalid input, display error message
        echo "Invalid input, please try again.";
    }
}
?>

Keywords

PHP sessions cookies user input validation database submission comparison.

Related Questions