OOP in WordPress Theme Development

OOP in WordPress Theme Development — a practical guide to OOP WordPress theme with clear examples you can reuse in real projects.

OOP Tutorial Series (61/65). Prefer one article? Read the complete OOP tutorial.

Short description

Even classic themes benefit from OOP helpers and setup classes instead of a giant functions.php.

Theme setup class

final class ThemeSetup {
    public function register(): void {
        add_action('after_setup_theme', [$this, 'supports']);
        add_action('wp_enqueue_scripts', [$this, 'assets']);
    }
    public function supports(): void {
        add_theme_support('title-tag');
    }
    public function assets(): void {
        wp_enqueue_style('theme', get_stylesheet_uri(), [], '1.0.0');
    }
}