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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 |
|---|---|
| 246 | $permalink = preg_replace('#/+#', '/', "/$permalink"); |
| 247 | $output = get_option('home') . user_trailingslashit($permalink, 'feed'); |
| 248 | } else { |
| 249 | if ( false !== strpos($feed, 'comments_') ) |
| 250 | $feed = str_replace('comments_', 'comments-', $feed); |
| 251 | |
| 252 | $output = get_option('home') . "/?feed={$feed}"; |
| 253 | } |
| 254 | |
| 255 | return apply_filters('feed_link', $output, $feed); |
| 256 | } |
| 257 | |
| 258 | function get_post_comments_feed_link($post_id = '', $feed = 'rss2') { |
| 259 | global $id; |
| 260 | |
| 261 | if ( empty($post_id) ) |
| 262 | $post_id = (int) $id; |
| 263 | |
| 264 | if ( '' != get_option('permalink_structure') ) { |