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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 |
|---|---|
| 379 | /** |
| 380 | * Filter the retrieved post excerpt. |
| 381 | * |
| 382 | * @since 1.2.0 |
| 383 | * @since 4.5.0 Introduced the `$post` parameter. |
| 384 | * |
| 385 | * @param string $post_excerpt The post excerpt. |
| 386 | * @param WP_Post $post Post object. |
| 387 | */ |
| 388 | return apply_filters( 'get_the_excerpt', $post->post_excerpt, $post ); |
| 389 | } |
| 390 | |
| 391 | /** |
| 392 | * Whether post has excerpt. |
| 393 | * |
| 394 | * @since 2.3.0 |
| 395 | * |
| 396 | * @param int|WP_Post $id Optional. Post ID or post object. |
| 397 | * @return bool |