What are the advantages of using separate PHP files for processing data and displaying content, as opposed to combining everything into one file?

Separating data processing and content display into separate PHP files promotes code organization and maintainability. It allows for easier debugging, reusability of code, and better collaboration among team members. By keeping concerns separate, it also enhances the readability and scalability of the codebase.

// data_processing.php
<?php
// Data processing logic here
$data = fetchData();

// content_display.php
<?php
// Display content using the processed data
echo "<h1>Welcome, " . $data['username'] . "!</h1>";