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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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736 |
|
737 | /** |
738 | * Filters the attached file based on the given ID. |
739 | * |
740 | * @since 2.1.0 |
741 | * |
742 | * @param string|false $file The file path to where the attached file should be, false otherwise. |
743 | * @param int $attachment_id Attachment ID. |
744 | */ |
745 | return apply_filters( 'get_attached_file', $file, $attachment_id ); |
746 | } |
747 |
|
748 | /** |
749 | * Updates attachment file path based on attachment ID. |
750 | * |
751 | * Used to update the file path of the attachment, which uses post meta name |
752 | * '_wp_attached_file' to store the path of the attachment. |
753 | * |
754 | * @since 2.1.0 |