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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 |
|---|---|
| 216 | function the_excerpt_rss() { |
| 217 | $output = get_the_excerpt(); |
| 218 | /** |
| 219 | * Filter the post excerpt for a feed. |
| 220 | * |
| 221 | * @since 1.2.0 |
| 222 | * |
| 223 | * @param string $output The current post excerpt. |
| 224 | */ |
| 225 | echo apply_filters( 'the_excerpt_rss', $output ); |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * Display the permalink to the post for use in feeds. |
| 230 | * |
| 231 | * @since 2.3.0 |
| 232 | */ |
| 233 | function the_permalink_rss() { |
| 234 | /** |