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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 |
|---|---|
| 284 | |
| 285 | /** |
| 286 | * Filters the attached file based on the given ID. |
| 287 | * |
| 288 | * @since 2.1.0 |
| 289 | * |
| 290 | * @param string $file Path to attached file. |
| 291 | * @param int $attachment_id Attachment ID. |
| 292 | */ |
| 293 | return apply_filters( 'get_attached_file', $file, $attachment_id ); |
| 294 | } |
| 295 | |
| 296 | /** |
| 297 | * Update attachment file path based on attachment ID. |
| 298 | * |
| 299 | * Used to update the file path of the attachment, which uses post meta name |
| 300 | * '_wp_attached_file' to store the path of the attachment. |
| 301 | * |
| 302 | * @since 2.1.0 |