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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 |
|---|---|
| 341 | /** |
| 342 | * Filters the permalink for a page. |
| 343 | * |
| 344 | * @since 1.5.0 |
| 345 | * |
| 346 | * @param string $link The page's permalink. |
| 347 | * @param int $post_id The ID of the page. |
| 348 | * @param bool $sample Is it a sample permalink. |
| 349 | */ |
| 350 | return apply_filters( 'page_link', $link, $post->ID, $sample ); |
| 351 | } |
| 352 | |
| 353 | /** |
| 354 | * Retrieves the page permalink. |
| 355 | * |
| 356 | * Ignores page_on_front. Internal use only. |
| 357 | * |
| 358 | * @since 2.1.0 |
| 359 | * @access private |