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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 |
|---|---|
| 336 | } |
| 337 | |
| 338 | /** |
| 339 | * Filter the retrieved post excerpt. |
| 340 | * |
| 341 | * @since 1.2.0 |
| 342 | * |
| 343 | * @param string $post_excerpt The post excerpt. |
| 344 | */ |
| 345 | return apply_filters( 'get_the_excerpt', $post->post_excerpt ); |
| 346 | } |
| 347 | |
| 348 | /** |
| 349 | * Whether post has excerpt. |
| 350 | * |
| 351 | * @since 2.3.0 |
| 352 | * |
| 353 | * @param int|WP_Post $id Optional. Post ID or post object. |
| 354 | * @return bool |