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get_default_feed()

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概述

get_default_feed() 函数用于检索 WordPress 中的默认 feed 类型，默认值为 'rss2'，但可通过 'default_feed' 过滤器进行修改。

关键要点

  • 函数返回默认 feed 类型字符串，如 'rss2'、'atom' 等。
  • 默认 feed 类型可通过 apply_filters('default_feed', 'rss2') 钩子进行过滤和自定义。
  • 函数内部处理 'rss' 值，自动转换为 'rss2' 以确保兼容性。
  • 该函数被多个核心函数调用，如 feed_links()、WP_Query::is_feed() 等，用于生成 feed 链接和判断查询类型。

代码示例

function get_default_feed() {
    $default_feed = apply_filters( 'default_feed', 'rss2' );
    return ( 'rss' === $default_feed ) ? 'rss2' : $default_feed;
}
📄 原文内容

Retrieves the default feed.

Description

The default feed is ‘rss2’, unless a plugin changes it through the ‘default_feed’ filter.

Return

string Default feed, or for example 'rss2', 'atom', etc.

Source

function get_default_feed() {
	/**
	 * Filters the default feed type.
	 *
	 * @since 2.5.0
	 *
	 * @param string $feed_type Type of default feed. Possible values include 'rss2', 'atom'.
	 *                          Default 'rss2'.
	 */
	$default_feed = apply_filters( 'default_feed', 'rss2' );

	return ( 'rss' === $default_feed ) ? 'rss2' : $default_feed;
}

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Hooks

apply_filters( ‘default_feed’, string $feed_type )

Filters the default feed type.

Uses Description
apply_filters()wp-includes/plugin.php

Calls the callback functions that have been added to a filter hook.
Used by Description
feed_links()wp-includes/general-template.php

Displays the links to the general feeds.
WP::send_headers()wp-includes/class-wp.php

Sends additional HTTP headers for caching, content type, etc.
WP_Query::is_feed()wp-includes/class-wp-query.php

Determines whether the query is for a feed.
do_feed()wp-includes/functions.php

Loads the feed template from the use of an action hook.
get_search_comments_feed_link()wp-includes/link-template.php

Retrieves the permalink for the search results comments feed.
get_post_type_archive_feed_link()wp-includes/link-template.php

Retrieves the permalink for a post type archive feed.
get_term_feed_link()wp-includes/link-template.php

Retrieves the feed link for a term.
get_search_feed_link()wp-includes/link-template.php

Retrieves the permalink for the search results feed.
get_feed_link()wp-includes/link-template.php

Retrieves the permalink for the feed type.
get_post_comments_feed_link()wp-includes/link-template.php

Retrieves the permalink for the post comments feed.
get_author_feed_link()wp-includes/link-template.php

Retrieves the feed link for a given author.
get_the_category_rss()wp-includes/feed.php

Retrieves all of the post categories, formatted for use in feeds.
feed_content_type()wp-includes/feed.php

Returns the content type for specified feed type.
get_the_content_feed()wp-includes/feed.php

Retrieves the post content for feeds.
redirect_canonical()wp-includes/canonical.php

Redirects incoming links to the proper URL based on the site url.

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Changelog

Version Description
2.5.0 Introduced.