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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 |
|---|---|
| 1341 | /** |
| 1342 | * Filters the URL used for a post preview. |
| 1343 | * |
| 1344 | * @since 2.0.5 |
| 1345 | * @since 4.0.0 Added the `$post` parameter. |
| 1346 | * |
| 1347 | * @param string $preview_link URL used for the post preview. |
| 1348 | * @param WP_Post $post Post object. |
| 1349 | */ |
| 1350 | return apply_filters( 'preview_post_link', $preview_link, $post ); |
| 1351 | } |
| 1352 | |
| 1353 | /** |
| 1354 | * Retrieves the edit post link for post. |
| 1355 | * |
| 1356 | * Can be used within the WordPress loop or outside of it. Can be used with |
| 1357 | * pages, posts, attachments, and revisions. |
| 1358 | * |
| 1359 | * @since 2.3.0 |