In PHP development, how can separating output from functions improve error identification and resolution, particularly in cases of missing database entries?

Separating output from functions in PHP development can improve error identification and resolution by allowing for clearer separation of concerns. This means that functions are responsible for processing data and logic, while output is handled separately. In cases of missing database entries, this separation can make it easier to pinpoint where the issue lies and troubleshoot it effectively.

// Function to retrieve data from the database
function getDataFromDatabase($id) {
    // Database query to retrieve data
    $data = fetchDataFromDatabase($id);

    return $data;
}

// Output function to display data
function displayData($data) {
    if($data) {
        echo "Data found: " . $data;
    } else {
        echo "No data found.";
    }
}

// Main code
$id = 123;
$data = getDataFromDatabase($id);
displayData($data);