What are the advantages and disadvantages of using hidden fields to store form data in PHP?

Hidden fields in PHP can be used to store form data that needs to be passed along with the form submission. The advantage of using hidden fields is that they are not visible to the user, making them a good way to store sensitive data. However, the disadvantage is that they can be manipulated by the user, so they should not be used for storing critical information. 

<form action="process_form.php" method="post">
  <input type="hidden" name="user_id" value="<?php echo $user_id; ?>">
  <!-- Other form fields here -->
  <input type="submit" value="Submit">
</form>

Keywords

hidden fields form data PHP advantages disadvantages

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