In the context of PHP development, how can the E.V.A. (Eingabe-Verarbeitung-Ausgabe) principle be effectively applied to separate processing logic from presentation in the code structure?

In PHP development, the E.V.A. principle can be effectively applied by separating the input, processing, and output stages of the code. This helps in maintaining a clean and organized code structure by keeping the processing logic separate from the presentation. By following this principle, it becomes easier to debug, maintain, and scale the codebase. 

<?php

// Input stage
$input = $_POST['user_input'];

// Processing stage
$processed_input = processInput($input);

function processInput($input) {
    // Processing logic goes here
    return $processed_data;
}

// Output stage
echo $processed_input;

?>

Keywords

PHP E.V.A. principle separation of concerns MVC architecture template engines

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