What are the advantages and disadvantages of using POST versus GET for form data in PHP?

When submitting form data in PHP, using POST method is generally recommended for sensitive or large amounts of data as it sends the data in the request body, making it more secure and allowing for larger data sizes. However, GET method is suitable for small amounts of non-sensitive data as it appends the data to the URL, making it easier to bookmark and share. It is important to consider the nature of the data being sent and the security implications when choosing between POST and GET.

<form method="post" action="process_form.php">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username">
  
  <label for="password">Password:</label>
  <input type="password" id="password" name="password">
  
  <button type="submit">Submit</button>
</form>