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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 |
|---|---|
| 1242 | /** |
| 1243 | * Filters the URL used for a post preview. |
| 1244 | * |
| 1245 | * @since 2.0.5 |
| 1246 | * @since 4.0.0 Added the `$post` parameter. |
| 1247 | * |
| 1248 | * @param string $preview_link URL used for the post preview. |
| 1249 | * @param WP_Post $post Post object. |
| 1250 | */ |
| 1251 | return apply_filters( 'preview_post_link', $preview_link, $post ); |
| 1252 | } |
| 1253 | |
| 1254 | /** |
| 1255 | * Retrieves the edit post link for post. |
| 1256 | * |
| 1257 | * Can be used within the WordPress loop or outside of it. Can be used with |
| 1258 | * pages, posts, attachments, and revisions. |
| 1259 | * |
| 1260 | * @since 2.3.0 |