In what ways can copying and pasting code from online sources impact the functionality of sorting features in PHP applications?

Copying and pasting code from online sources can impact the functionality of sorting features in PHP applications if the code contains errors or conflicts with existing code. To solve this issue, it is important to carefully review and test the copied code before integrating it into the application. Additionally, ensuring that the code follows best practices and is compatible with the existing codebase can help prevent sorting feature malfunctions.

// Example of implementing sorting feature in PHP application

// Retrieve data from database
$data = fetchDataFromDatabase();

// Check if sorting parameter is set
if(isset($_GET['sort'])) {
    $sort = $_GET['sort'];
    switch($sort) {
        case 'asc':
            usort($data, function($a, $b) {
                return $a['field'] <=> $b['field'];
            });
            break;
        case 'desc':
            usort($data, function($a, $b) {
                return $b['field'] <=> $a['field'];
            });
            break;
        default:
            // Handle invalid sorting parameter
            break;
    }
}

// Display sorted data
foreach($data as $item) {
    echo $item['field'] . "<br>";
}