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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 |
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450 |
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451 | /** |
452 | * Filters the permalink for an attachment. |
453 | * |
454 | * @since 2.0.0 |
455 | * |
456 | * @param string $link The attachment's permalink. |
457 | * @param int $post_id Attachment ID. |
458 | */ |
459 | return apply_filters( 'attachment_link', $link, $post->ID ); |
460 | } |
461 |
|
462 | /** |
463 | * Retrieves the permalink for the year archives. |
464 | * |
465 | * @since 1.5.0 |
466 | * |
467 | * @global WP_Rewrite $wp_rewrite WordPress rewrite component. |
468 | * |