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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 |
|---|---|
| 1419 | /** |
| 1420 | * Filters the URL used for a post preview. |
| 1421 | * |
| 1422 | * @since 2.0.5 |
| 1423 | * @since 4.0.0 Added the `$post` parameter. |
| 1424 | * |
| 1425 | * @param string $preview_link URL used for the post preview. |
| 1426 | * @param WP_Post $post Post object. |
| 1427 | */ |
| 1428 | return apply_filters( 'preview_post_link', $preview_link, $post ); |
| 1429 | } |
| 1430 | |
| 1431 | /** |
| 1432 | * Retrieves the edit post link for post. |
| 1433 | * |
| 1434 | * Can be used within the WordPress loop or outside of it. Can be used with |
| 1435 | * pages, posts, attachments, and revisions. |
| 1436 | * |
| 1437 | * @since 2.3.0 |