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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 |
---|---|
426 |
|
427 | /** |
428 | * Filter the permalink for an attachment. |
429 | * |
430 | * @since 2.0.0 |
431 | * |
432 | * @param string $link The attachment's permalink. |
433 | * @param int $post_id Attachment ID. |
434 | */ |
435 | return apply_filters( 'attachment_link', $link, $post->ID ); |
436 | } |
437 |
|
438 | /** |
439 | * Retrieve the permalink for the year archives. |
440 | * |
441 | * @since 1.5.0 |
442 | * |
443 | * @global WP_Rewrite $wp_rewrite |
444 | * |