Custom 404 page for Genesis

404.php

<?php
/**
 *
 * @package LCW\Templates
 * @author  Pamela Hirsch
 * @license GPL-2.0+
 * @link    http://www.pamelahirsch.com/services
 */

add_action( 'genesis_meta', 'phc_genesis_meta' );

function phc_genesis_meta() {

		//* Force content-sidebar layout setting
		add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_full_width_content' );

		//* Add 404 page body class
		add_filter( 'body_class', 'phc_body_class' );

}

function phc_body_class( $classes ) {

	$classes[] = 'phc-404';
	return $classes;
	
}

//* Remove default loop
remove_action( 'genesis_loop', 'genesis_do_loop' );

add_action( 'genesis_loop', 'phc_404' );

/**
 * This function outputs a 404 "Not Found" error message
 *
 * @since 1.6
 */
function phc_404() {

	echo genesis_html5() ? '<article class="entry">' : '<div class="post hentry">';

		printf( '<h3>%s</h3>', __( 'We\'re sorry, but the page you\'re looking for no longer exits.', 'genesis' ) );

		echo '<div class="entry-content">';

		echo '<p>' . sprintf( __( 'Please return to the <a href=" '. $siteurl .'/">homepage</a> and see if you can find what you were looking for.', 'genesis' ), home_url() ) . '</p>';

		echo '</div>';

	echo genesis_html5() ? '</article>' : '</div>';

}

genesis();