Dynamic, URL-Based Conditional Logic Using wp_parse_url()

A PHP snippet for Dynamic, URL-Based Conditional Logic Using wp_parse_url().

function add_custom_body_class_based_on_url($classes) {
    $current_url = home_url($_SERVER['REQUEST_URI']);
    $url_parts = wp_parse_url($current_url);

    if (!empty($url_parts['path'])) {
        $path_segments = explode('/', trim($url_parts['path'], '/'));

        // Check if a certain segment is present.
        if (in_array('special-page', $path_segments)) {
            $classes[] = 'custom-special-page';
        }
    }

    return $classes;
}

add_filter('body_class', 'add_custom_body_class_based_on_url');