What are the potential security risks of using a link to submit a form in PHP?

Using a link to submit a form in PHP can expose your application to security risks such as Cross-Site Request Forgery (CSRF) attacks. To mitigate this risk, you should use a POST request instead of a GET request when submitting sensitive information through a form.

<form method="post" action="submit_form.php">
  <!-- form fields go here -->
  <button type="submit">Submit</button>
</form>