What are the consequences of mixing processing and output in PHP code?

Mixing processing and output in PHP code can lead to readability issues, maintenance difficulties, and can make the code harder to debug. It is recommended to separate processing logic from output presentation by using a template engine like Twig or separating PHP logic into separate files. 

<?php
// Processing logic
$data = fetchDataFromDatabase();

// Output presentation
include 'template.php';
?>

Keywords

buffering ob_start ob_end_flush separation of concerns MVC framework

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