How can variables in URL display be avoided in PHP?

To avoid displaying variables in the URL in PHP, you can use POST method instead of GET method to send form data. This way, the data will be sent in the HTTP request body rather than in the URL. This helps to keep sensitive information secure and prevents users from easily manipulating the data in the URL.

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