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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 |
|---|---|
| 3535 | * |
| 3536 | * @since 3.5.0 |
| 3537 | * |
| 3538 | * @param string $output Adjacent image HTML markup. |
| 3539 | * @param int $attachment_id Attachment ID |
| 3540 | * @param string|int[] $size Requested image size. Can be any registered image size name, or |
| 3541 | * an array of width and height values in pixels (in that order). |
| 3542 | * @param string $text Link text. |
| 3543 | */ |
| 3544 | return apply_filters( "{$adjacent}_image_link", $output, $attachment_id, $size, $text ); |
| 3545 | } |
| 3546 | |
| 3547 | /** |
| 3548 | * Displays next or previous image link that has the same post parent. |
| 3549 | * |
| 3550 | * Retrieves the current attachment object from the $post global. |
| 3551 | * |
| 3552 | * @since 2.5.0 |
| 3553 | * |