Get current page id on WordPress noConflict Way

/**
 * Custom excerpt
 *
 * @since 1.0
 *
 * @uses get_queried_object()
 *
 * @see get_the_ID()
 *
 * @return int
 */
if ( !function_exists( 'get_the_real_ID' ) ) {
	function get_the_real_ID() {
	  if (in_the_loop()) {
	       $post_id = get_the_ID();
	  } else {
		if ( is_front_page() && !is_home() ) {
			$frontpage_id = get_option( 'page_on_front' );
			$post_id = $frontpage_id;
		} elseif ( !is_front_page() && is_home() ) {
			$page_for_posts = get_option( 'page_for_posts' );
			$post_id = $page_for_posts;
		} else {
			global $wp_query;
			$page_object = $wp_query->get_queried_object();
			
			if ( is_page() || is_singular() ) {
				$post_id = $wp_query->get_queried_object_id();
			} else {
				$post_id = 0;
			}
		}
	  }
	  return $post_id;
	}
}