How can PHP be used to call a PHP page from within another PHP page, instead of using an HTML form?

To call a PHP page from within another PHP page without using an HTML form, you can use the PHP `include` or `require` function. This allows you to include the contents of one PHP file within another PHP file. This method is useful for reusing code, modularizing your project, and simplifying maintenance.

<?php
include 'path/to/your/php/page.php';
?>