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<?php
namespace Yoast\WP\SEO\Integrations\Front_End;
use Yoast\WP\SEO\Conditionals\Front_End_Conditional;
use Yoast\WP\SEO\Integrations\Integration_Interface;
use Yoast\WP\SEO\Wrappers\WP_Query_Wrapper;
/**
* Handles intercepting requests.
*/
class Handle_404 implements Integration_Interface {
/**
* The WP Query wrapper.
*
* @var WP_Query_Wrapper
*/
private $query_wrapper;
/**
* Returns the conditionals based in which this loadable should be active.
*
* @return array
*/
public static function get_conditionals() {
return [ Front_End_Conditional::class ];
}
/**
* Initializes the integration.
*
* This is the place to register hooks and filters.
*
* @return void
*/
public function register_hooks() {
\add_filter( 'pre_handle_404', [ $this, 'handle_404' ] );
}
/**
* Handle_404 constructor.
*
* @codeCoverageIgnore Handles dependencies.
*
* @param WP_Query_Wrapper $query_wrapper The query wrapper.
*/
public function __construct( WP_Query_Wrapper $query_wrapper ) {
$this->query_wrapper = $query_wrapper;
}
/**
* Handles the 404 status code.
*
* @param bool $handled Whether we've handled the request.
*
* @return bool True if it's 404.
*/
public function handle_404( $handled ) {
if ( ! $this->is_feed_404() ) {
return $handled;
}
$this->set_404();
$this->set_headers();
\add_filter( 'old_slug_redirect_url', '__return_false' );
\add_filter( 'redirect_canonical', '__return_false' );
return true;
}
/**
* If there are no posts in a feed, make it 404 instead of sending an empty RSS feed.
*
* @return bool True if it's 404.
*/
protected function is_feed_404() {
if ( ! \is_feed() ) {
return false;
}
$wp_query = $this->query_wrapper->get_query();
// Don't 404 if the query contains post(s) or an object.
if ( $wp_query->posts || $wp_query->get_queried_object() ) {
return false;
}
// Don't 404 if it isn't archive or singular.
if ( ! $wp_query->is_archive() && ! $wp_query->is_singular() ) {
return false;
}
return true;
}
/**
* Sets the 404 status code.
*
* @return void
*/
protected function set_404() {
$wp_query = $this->query_wrapper->get_query();
$wp_query->is_feed = false;
$wp_query->set_404();
$this->query_wrapper->set_query( $wp_query );
}
/**
* Sets the headers for http.
*
* @codeCoverageIgnore
*
* @return void
*/
protected function set_headers() {
// Overwrite Content-Type header.
if ( ! \headers_sent() ) {
\header( 'Content-Type: ' . \get_option( 'html_type' ) . '; charset=' . \get_option( 'blog_charset' ) );
}
\status_header( 404 );
\nocache_headers();
}
}