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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 |
|---|---|
| 169 | * Display the post excerpt for the feed. |
| 170 | * |
| 171 | * @package WordPress |
| 172 | * @subpackage Feed |
| 173 | * @since 0.71 |
| 174 | * @uses apply_filters() Calls 'the_excerpt_rss' hook on the excerpt. |
| 175 | */ |
| 176 | function the_excerpt_rss() { |
| 177 | $output = get_the_excerpt(); |
| 178 | echo apply_filters('the_excerpt_rss', $output); |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Display the permalink to the post for use in feeds. |
| 183 | * |
| 184 | * @package WordPress |
| 185 | * @subpackage Feed |
| 186 | * @since 2.3.0 |
| 187 | * @uses apply_filters() Call 'the_permalink_rss' on the post permalink |