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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 |
|---|---|
| 2657 | * either 'next', or 'previous'. |
| 2658 | * |
| 2659 | * @since 3.5.0 |
| 2660 | * |
| 2661 | * @param string $output Adjacent image HTML markup. |
| 2662 | * @param int $attachment_id Attachment ID |
| 2663 | * @param string $size Image size. |
| 2664 | * @param string $text Link text. |
| 2665 | */ |
| 2666 | echo apply_filters( "{$adjacent}_image_link", $output, $attachment_id, $size, $text ); |
| 2667 | } |
| 2668 | |
| 2669 | /** |
| 2670 | * Retrieves taxonomies attached to given the attachment. |
| 2671 | * |
| 2672 | * @since 2.5.0 |
| 2673 | * |
| 2674 | * @param int|array|object $attachment Attachment ID, data array, or data object. |
| 2675 | * @return array Empty array on failure. List of taxonomies on success. |