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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
263 | if ( empty($feed) ) |
264 | $feed = get_default_feed(); |
265 |
|
266 | if ( false !== strpos($feed, 'comments_') ) |
267 | $feed = str_replace('comments_', 'comments-', $feed); |
268 |
|
269 | $output = get_option('home') . "/?feed={$feed}"; |
270 | } |
271 |
|
272 | return apply_filters('feed_link', $output, $feed); |
273 | } |
274 |
|
275 | function get_post_comments_feed_link($post_id = '', $feed = '') { |
276 | global $id; |
277 |
|
278 | if ( empty($post_id) ) |
279 | $post_id = (int) $id; |
280 |
|
281 | if ( empty($feed) ) |