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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 |
---|---|
4868 | /** |
4869 | * Filter the attachment meta data. |
4870 | * |
4871 | * @since 2.1.0 |
4872 | * |
4873 | * @param array|bool $data Array of meta data for the given attachment, or false |
4874 | * if the object does not exist. |
4875 | * @param int $post_id Attachment ID. |
4876 | */ |
4877 | return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID ); |
4878 | } |
4879 |
|
4880 | /** |
4881 | * Update metadata for an attachment. |
4882 | * |
4883 | * @since 2.1.0 |
4884 | * |
4885 | * @param int $post_id Attachment ID. |
4886 | * @param array $data Attachment data. |