How can hidden fields be used in PHP forms to differentiate between form submissions?

To differentiate between form submissions in PHP, hidden fields can be used to store unique identifiers or values that can be checked when the form is submitted. This can help prevent duplicate form submissions or identify the source of the form submission. By including a hidden field with a specific value that changes with each form submission, it becomes easier to distinguish between different form submissions. 

<form method="post" action="process_form.php">
    <input type="hidden" name="form_id" value="<?php echo uniqid(); ?>">
    <!-- other form fields here -->
    <input type="submit" value="Submit Form">
</form>

Keywords

hidden fields PHP forms form submissions differentiate data validation

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