Custom 404 Not Found Page in Genesis Framework

404.php

<?php
/**
 * 404 NOT FOUND.
 *
 * @package      StudioPlayer
 * @link         https://rainastudio.com/themes/studioplayer
 * @author       RainaStudio
 * @copyright    Copyright © 2018 RainaStudio
 * @license      GPL-2.0+
 */
 
// Remove page title.
remove_action( 'genesis_post_title', 'genesis_do_post_title' );

// Remove site header elements.
remove_action( 'genesis_header', 'genesis_header_markup_open', 5 );
remove_action( 'genesis_header', 'genesis_do_header' );
remove_action( 'genesis_header', 'genesis_header_markup_close', 15 );

// Remove navigation.
remove_theme_support( 'genesis-menus' );

// Force full width.
add_filter( 'genesis_pre_get_option_site_layout', '__genesis_return_full_width_content' );

// Add 'not-found' class to body.
function nf_site_inner_attr( $attributes ) {
	
	$attributes['class'] .= ' not-found';
	
	// Add the attributes from .entry, since this replaces the main entry
	$attributes = wp_parse_args( $attributes, genesis_attributes_entry( array() ) );
	
	return $attributes;
}

add_filter( 'genesis_attr_body', 'nf_site_inner_attr' );

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

// Add content to default loop.
/**
 * This function outputs a 404 "Not Found" error message.
 *
 * @since 1.6
 */
function genesis_404() {

	genesis_markup( array(
		'open' => '<article class="entry">',
		'context' => 'entry-404',
	) );

		printf( '<h1 class="entry-title"><i class="fa fa-life-ring"></i> %s</h1>', apply_filters( 'genesis_404_entry_title', __( '404 Not Found!', 'genesis' ) ) );
		echo '<div class="entry-content">';
?>			
			<p>Server can't find your query at <?php echo $_SERVER["SERVER_NAME"]; ?>. In the meantime, you can...</p>
			<ul>
				<li>See what's happening at <?php echo get_bloginfo( 'name' ); ?> on <a href="<?php echo get_permalink( get_option( 'page_for_posts' ) ); ?>">our awesome blog.</a></li>
				<li>Read more about our project on <a href="https://rainastudio.com/service/">the service page.</a></li>
				<li>Sign up for newsletter and join the community!</li>
			</ul>
			<div class="not-found-widget"><?php
				if ( is_active_sidebar('not-found-widget')) {
					// 404 page widget area.
					genesis_widget_area( 'not-found-widget', array(
						'before' => '<div class="not-found-widget widget-area clearfix"><div class="wrap">',
						'after'  => '</div></div>',
					) );
				}
			?></div>
<?php
		echo '</div>';

	genesis_markup( array(
		'close' => '</article>',
		'context' => 'entry-404',
	) );

}
add_action( 'genesis_loop', 'genesis_404' );

// Remove footer widgets.
remove_theme_support( 'genesis-footer-widgets' );

// Remove site footer elements.
remove_action( 'genesis_footer', 'genesis_footer_markup_open', 5 );
remove_action( 'genesis_footer', 'genesis_do_footer' );
remove_action( 'genesis_footer', 'genesis_footer_markup_close', 15 );

genesis();