WordPress theme class example

functions.php

<?php

class AseTheme {
	public function __construct() {
		add_action( 'after_setup_theme', array( $this, 'after_setup_theme' ) );
		
		add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
		
		// ...
	}
	
	public function after_setup_theme() {
		
	}
	
	public function enqueue_scripts() {
		
	}
	
	// ...
}

$ase_theme = new AseTheme();