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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 |
|---|---|
| 520 | * Filters the permalink for an attachment. |
| 521 | * |
| 522 | * @since 2.0.0 |
| 523 | * @since 5.6.0 Providing an empty string will now disable |
| 524 | * the view attachment page link on the media modal. |
| 525 | * |
| 526 | * @param string $link The attachment's permalink. |
| 527 | * @param int $post_id Attachment ID. |
| 528 | */ |
| 529 | return apply_filters( 'attachment_link', $link, $post->ID ); |
| 530 | } |
| 531 | |
| 532 | /** |
| 533 | * Retrieves the permalink for the year archives. |
| 534 | * |
| 535 | * @since 1.5.0 |
| 536 | * |
| 537 | * @global WP_Rewrite $wp_rewrite WordPress rewrite component. |
| 538 | * |