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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 |
|---|---|
| 2467 | } |
| 2468 | |
| 2469 | $file = apply_filters('wp_delete_file', $file); |
| 2470 | |
| 2471 | if ( ! empty($file) ) |
| 2472 | @ unlink($file); |
| 2473 | |
| 2474 | clean_post_cache($postid); |
| 2475 | |
| 2476 | do_action('delete_attachment', $postid); |
| 2477 | |
| 2478 | return $post; |
| 2479 | } |
| 2480 | |
| 2481 | /** |
| 2482 | * Retrieve attachment meta field for attachment ID. |
| 2483 | * |
| 2484 | * @since 2.1.0 |
| 2485 | * |