wp menu declaration

<?php
    // Register menus
    add_action( 'after_setup_theme', 'theme_register_nav_menu' );
    function theme_register_nav_menu() {
        register_nav_menus(
            array(
                'primary' => __( 'Primary Menu', 'theme' ),
                'footer' => __( 'Footer Menu', 'theme' )
            )
        );
    }
    // Add menus to theme locations
    function theme_menu_location() {
        register_nav_menu( 'primary', __( 'Primary Menu', 'theme' ) );
        register_nav_menu( 'footer', __( 'Footer Menu', 'theme' ) );
    }
    add_action( 'init', 'theme_menu_location' );
?>