tags' ) )
|| ( \is_tax() && $this->is_true( 'remove_feed_custom_taxonomies' ) ) ) {
$term = \get_queried_object();
$url = \get_term_link( $term, $term->taxonomy );
if ( \is_wp_error( $url ) ) {
$url = \home_url();
}
$this->redirect_feed( $url, 'We disable taxonomy feeds for performance reasons.' );
}
if ( ( \is_post_type_archive() ) && $this->is_true( 'remove_feed_post_types' ) ) {
$url = \get_post_type_archive_link( $this->get_queried_post_type() );
$this->redirect_feed( $url, 'We disable post type feeds for performance reasons.' );
}
if ( \is_search() && $this->is_true( 'remove_feed_search' ) ) {
$url = \trailingslashit( \home_url() ) . '?s=' . \get_search_query();
$this->redirect_feed( $url, 'We disable search RSS feeds for performance reasons.' );
}
}
/**
* Sends a cache control header.
*
* @param int $expiration The expiration time.
*
* @return void
*/
public function cache_control_header( $expiration ) {
\header_remove( 'Expires' );
// The cacheability of the current request. 'public' allows caching, 'private' would not allow caching by proxies like CloudFlare.
$cacheability = 'public';
$format = '%1$s, max-age=%2$d, s-maxage=%2$d, stale-while-revalidate=120, stale-if-error=14400';
if ( \is_user_logged_in() ) {
$expiration = 0;
$cacheability = 'private';
$format = '%1$s, max-age=%2$d';
}
\header( \sprintf( 'Cache-Control: ' . $format, $cacheability, $expiration ), true );
}
/**
* Redirect a feed result to somewhere else.
*
* @param string $url The location we're redirecting to.
* @param string $reason The reason we're redirecting.
*
* @return void
*/
private function redirect_feed( $url, $reason ) {
\header_remove( 'Content-Type' );
\header_remove( 'Last-Modified' );
$this->cache_control_header( 7 * \DAY_IN_SECONDS );
\wp_safe_redirect( $url, 301, 'Yoast SEO: ' . $reason );
exit;
}
/**
* Retrieves the queried post type.
*
* @return string The queried post type.
*/
private function get_queried_post_type() {
$post_type = \get_query_var( 'post_type' );
if ( \is_array( $post_type ) ) {
$post_type = \reset( $post_type );
}
return $post_type;
}
/**
* Checks if the value of an option is set to true.
*
* @param string $option_name The option name.
*
* @return bool
*/
private function is_true( $option_name ) {
return $this->options_helper->get( $option_name ) === true;
}
}
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