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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 |
|---|---|
| 196 | * Display the post excerpt for the feed. |
| 197 | * |
| 198 | * @package WordPress |
| 199 | * @subpackage Feed |
| 200 | * @since 0.71 |
| 201 | * @uses apply_filters() Calls 'the_excerpt_rss' hook on the excerpt. |
| 202 | */ |
| 203 | function the_excerpt_rss() { |
| 204 | $output = get_the_excerpt(); |
| 205 | echo apply_filters('the_excerpt_rss', $output); |
| 206 | } |
| 207 | |
| 208 | /** |
| 209 | * Display the permalink to the post for use in feeds. |
| 210 | * |
| 211 | * @package WordPress |
| 212 | * @subpackage Feed |
| 213 | * @since 2.3.0 |
| 214 | * @uses apply_filters() Call 'the_permalink_rss' on the post permalink |