How can PHP form data from one page be passed to another page for processing?

To pass form data from one PHP page to another for processing, you can use the POST method to send the data to the second page. You can then access the form data on the second page using the $_POST superglobal array. Simply set the form action attribute to the URL of the second page, and use the $_POST array to retrieve the form data for processing.

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

// Second page (process.php)
<?php
$username = $_POST['username'];
$password = $_POST['password'];

// Process the form data as needed
?>