get_the_category_rss()
最后更新于:2021-11-27 01:46:08
get_the_category_rss( string$type=null)Retrieve all of the post categories, formatted for use in feeds.
参数
- $type
-
(string) (Optional) default is the type returned by get_default_feed().
Default value: null
响应
(string) All of the post categories for displaying in the feed.
源文件
文件: gc-includes/feed.php
function get_the_category_rss( $type = null ) {
if ( empty( $type ) ) {
$type = get_default_feed();
}
$categories = get_the_category();
$tags = get_the_tags();
$the_list = '';
$cat_names = array();
$filter = 'rss';
if ( 'atom' === $type ) {
$filter = 'raw';
}
if ( ! empty( $categories ) ) {
foreach ( (array) $categories as $category ) {
$cat_names[] = sanitize_term_field( 'name', $category->name, $category->term_id, 'category', $filter );
}
}
if ( ! empty( $tags ) ) {
foreach ( (array) $tags as $tag ) {
$cat_names[] = sanitize_term_field( 'name', $tag->name, $tag->term_id, 'post_tag', $filter );
}
}
$cat_names = array_unique( $cat_names );
foreach ( $cat_names as $cat_name ) {
if ( 'rdf' === $type ) {
$the_list .= "tt<dc:subject><![CDATA[$cat_name]]></dc:subject>n";
} elseif ( 'atom' === $type ) {
$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( get_bloginfo_rss( 'url' ) ), esc_attr( $cat_name ) );
} else {
$the_list .= "tt<category><![CDATA[" . html_entity_decode( $cat_name, ENT_COMPAT, get_option( 'blog_charset' ) ) . "]]></category>n";
}
}
/**
* Filters all of the post categories for display in a feed.
*
* @since 1.2.0
*
* @param string $the_list All of the RSS post categories.
* @param string $type Type of feed. Possible values include 'rss2', 'atom'.
* Default 'rss2'.
*/
return apply_filters( 'the_category_rss', $the_list, $type );
}