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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 |
|---|---|
| 425 | |
| 426 | /** |
| 427 | * Filters the permalink for an attachment. |
| 428 | * |
| 429 | * @since 2.0.0 |
| 430 | * |
| 431 | * @param string $link The attachment's permalink. |
| 432 | * @param int $post_id Attachment ID. |
| 433 | */ |
| 434 | return apply_filters( 'attachment_link', $link, $post->ID ); |
| 435 | } |
| 436 | |
| 437 | /** |
| 438 | * Retrieves the permalink for the year archives. |
| 439 | * |
| 440 | * @since 1.5.0 |
| 441 | * |
| 442 | * @global WP_Rewrite $wp_rewrite |
| 443 | * |