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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 |
|---|---|
| 1962 | * either 'next', or 'previous'. |
| 1963 | * |
| 1964 | * @since 3.5.0 |
| 1965 | * |
| 1966 | * @param string $output Adjacent image HTML markup. |
| 1967 | * @param int $attachment_id Attachment ID |
| 1968 | * @param string $size Image size. |
| 1969 | * @param string $text Link text. |
| 1970 | */ |
| 1971 | echo apply_filters( "{$adjacent}_image_link", $output, $attachment_id, $size, $text ); |
| 1972 | } |
| 1973 | |
| 1974 | /** |
| 1975 | * Retrieve taxonomies attached to the attachment. |
| 1976 | * |
| 1977 | * @since 2.5.0 |
| 1978 | * |
| 1979 | * @param int|array|object $attachment Attachment ID, Attachment data array, or Attachment data object. |
| 1980 | * @return array Empty array on failure. List of taxonomies on success. |