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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 |
|---|---|
| 388 | /** |
| 389 | * Filters the retrieved post excerpt. |
| 390 | * |
| 391 | * @since 1.2.0 |
| 392 | * @since 4.5.0 Introduced the `$post` parameter. |
| 393 | * |
| 394 | * @param string $post_excerpt The post excerpt. |
| 395 | * @param WP_Post $post Post object. |
| 396 | */ |
| 397 | return apply_filters( 'get_the_excerpt', $post->post_excerpt, $post ); |
| 398 | } |
| 399 | |
| 400 | /** |
| 401 | * Whether the post has a custom excerpt. |
| 402 | * |
| 403 | * @since 2.3.0 |
| 404 | * |
| 405 | * @param int|WP_Post $post Optional. Post ID or WP_Post object. Default is global $post. |
| 406 | * @return bool True if the post has a custom excerpt, false otherwise. |