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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 |
|---|---|
| 512 | |
| 513 | /** |
| 514 | * Filters the attached file based on the given ID. |
| 515 | * |
| 516 | * @since 2.1.0 |
| 517 | * |
| 518 | * @param string|false $file The file path to where the attached file should be, false otherwise. |
| 519 | * @param int $attachment_id Attachment ID. |
| 520 | */ |
| 521 | return apply_filters( 'get_attached_file', $file, $attachment_id ); |
| 522 | } |
| 523 | |
| 524 | /** |
| 525 | * Update attachment file path based on attachment ID. |
| 526 | * |
| 527 | * Used to update the file path of the attachment, which uses post meta name |
| 528 | * '_wp_attached_file' to store the path of the attachment. |
| 529 | * |
| 530 | * @since 2.1.0 |