93 lines
1.8 KiB
PHP
93 lines
1.8 KiB
PHP
<?php
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/**
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* WPSEO plugin file.
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*
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* @package WPSEO\Frontend
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*/
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/**
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* Class WPSEO_Handle_404
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*
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* Handles intercepting requests.
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*
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* @since 9.4
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*/
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class WPSEO_Handle_404 implements WPSEO_WordPress_Integration {
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/**
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* Registers all hooks to WordPress.
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*
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* @return void
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*/
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public function register_hooks() {
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add_filter( 'pre_handle_404', array( $this, 'handle_404' ) );
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}
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/**
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* Handle the 404 status code.
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*
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* @param bool $handled Whether we've handled the request.
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*
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* @return bool True if it's 404.
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*/
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public function handle_404( $handled ) {
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if ( is_feed() ) {
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return $this->is_feed_404( $handled );
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}
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return $handled;
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}
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/**
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* If there are no posts in a feed, make it 404 instead of sending an empty RSS feed.
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*
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* @global WP_Query $wp_query
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*
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* @param bool $handled Whether we've handled the request.
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*
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* @return bool True if it's 404.
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*/
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protected function is_feed_404( $handled ) {
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global $wp_query;
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// Don't 404 if the query contains post(s) or an object.
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if ( $wp_query->posts || $wp_query->get_queried_object() ) {
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return $handled;
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}
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// Don't 404 if it isn't archive or singular.
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if ( ! $wp_query->is_archive() && ! $wp_query->is_singular() ) {
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return $handled;
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}
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$wp_query->is_feed = false;
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$this->set_404();
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add_filter( 'old_slug_redirect_url', '__return_false' );
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add_filter( 'redirect_canonical', '__return_false' );
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return true;
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}
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/**
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* Sets the 404 status code.
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*
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* @global WP_Query $wp_query
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*
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* @return void
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*/
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private function set_404() {
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global $wp_query;
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// Overwrite Content-Type header.
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if ( ! headers_sent() ) {
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header( 'Content-Type: ' . get_option( 'html_type' ) . '; charset=' . get_option( 'blog_charset' ) );
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}
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$wp_query->set_404();
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status_header( 404 );
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nocache_headers();
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}
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}
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