GC::handle_404()
最后更新于:2021-11-26 07:24:20
GC::handle_404()Set the Headers for 404, if nothing is found for requested URL.
源文件
文件: gc-includes/class-gc.php
public function handle_404() {
global $gc_query;
/**
* Filters whether to short-circuit default header status handling.
*
* 响应ing a non-false value from the filter will short-circuit the handling
* and return early.
*
* @since 4.5.0
*
* @param bool $preempt Whether to short-circuit default header status handling. Default false.
* @param GC_Query $gc_query GeChiUI Query object.
*/
if ( false !== apply_filters( 'pre_handle_404', false, $gc_query ) ) {
return;
}
// If we've already issued a 404, bail.
if ( is_404() ) {
return;
}
$set_404 = true;
// Never 404 for the admin, robots, or favicon.
if ( is_admin() || is_robots() || is_favicon() ) {
$set_404 = false;
// If posts were found, check for paged content.
} elseif ( $gc_query->posts ) {
$content_found = true;
if ( is_singular() ) {
$post = isset( $gc_query->post ) ? $gc_query->post : null;
// Only set X-Pingback for single posts that allow pings.
if ( $post && pings_open( $post ) && ! headers_sent() ) {
header( 'X-Pingback: ' . get_bloginfo( 'pingback_url', 'display' ) );
}
// Check for paged content that exceeds the max number of pages.
$next = '<!--nextpage-->';
if ( $post && ! empty( $this->query_vars['page'] ) ) {
// Check if content is actually intended to be paged.
if ( false !== strpos( $post->post_content, $next ) ) {
$page = trim( $this->query_vars['page'], '/' );
$content_found = (int) $page <= ( substr_count( $post->post_content, $next ) + 1 );
} else {
$content_found = false;
}
}
}
// The posts page does not support the <!--nextpage--> pagination.
if ( $gc_query->is_posts_page && ! empty( $this->query_vars['page'] ) ) {
$content_found = false;
}
if ( $content_found ) {
$set_404 = false;
}
// We will 404 for paged queries, as no posts were found.
} elseif ( ! is_paged() ) {
$author = get_query_var( 'author' );
// Don't 404 for authors without posts as long as they matched an author on this site.
if ( is_author() && is_numeric( $author ) && $author > 0 && is_user_member_of_blog( $author )
// Don't 404 for these queries if they matched an object.
|| ( is_tag() || is_category() || is_tax() || is_post_type_archive() ) && get_queried_object()
// Don't 404 for these queries either.
|| is_home() || is_search() || is_feed()
) {
$set_404 = false;
}
}
if ( $set_404 ) {
// Guess it's time to 404.
$gc_query->set_404();
status_header( 404 );
nocache_headers();
} else {
status_header( 200 );
}
}