In what ways can PHP developers leverage PHP's array sorting functions to create dynamic and user-friendly features like displaying the most popular news articles on a website?

PHP developers can leverage PHP's array sorting functions to display the most popular news articles on a website by creating a system that tracks the number of views or likes each article receives and then sorting the articles based on this popularity metric. By using functions like `array_multisort()` or `usort()`, developers can easily reorder the array of articles based on popularity and display the most popular ones at the top of the list.

// Sample code to sort articles based on popularity
$articles = [
    ['title' => 'Article 1', 'popularity' => 100],
    ['title' => 'Article 2', 'popularity' => 50],
    ['title' => 'Article 3', 'popularity' => 75]
];

// Function to compare popularity of articles
function comparePopularity($a, $b) {
    return $b['popularity'] - $a['popularity'];
}

// Sort articles based on popularity
usort($articles, 'comparePopularity');

// Display sorted articles
foreach ($articles as $article) {
    echo $article['title'] . ' - Popularity: ' . $article['popularity'] . '<br>';
}