What are the advantages and disadvantages of using the POST method over the GET method in PHP form submissions?

When submitting form data in PHP, using the POST method is generally preferred over the GET method for sensitive or large amounts of data. POST method sends data in the HTTP request body, making it more secure as the information is not visible in the URL. However, POST requests are not cacheable and may have slightly slower performance compared to GET requests.

<form method="post" action="submit.php">
  <input type="text" name="username">
  <input type="password" name="password">
  <button type="submit">Submit</button>
</form>