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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 |
|---|---|
| 2746 | |
| 2747 | // Compute the URL. |
| 2748 | $url = $upload['url'] . "/$filename"; |
| 2749 | |
| 2750 | if ( is_multisite() ) { |
| 2751 | clean_dirsize_cache( $new_file ); |
| 2752 | } |
| 2753 | |
| 2754 | /** This filter is documented in wp-admin/includes/file.php */ |
| 2755 | return apply_filters( |
| 2756 | 'wp_handle_upload', |
| 2757 | array( |
| 2758 | 'file' => $new_file, |
| 2759 | 'url' => $url, |
| 2760 | 'type' => $wp_filetype['type'], |
| 2761 | 'error' => false, |
| 2762 | ), |
| 2763 | 'sideload' |
| 2764 | ); |