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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 |
|---|---|
| 2938 | |
| 2939 | // Compute the URL. |
| 2940 | $url = $upload['url'] . "/$filename"; |
| 2941 | |
| 2942 | if ( is_multisite() ) { |
| 2943 | clean_dirsize_cache( $new_file ); |
| 2944 | } |
| 2945 | |
| 2946 | /** This filter is documented in wp-admin/includes/file.php */ |
| 2947 | return apply_filters( |
| 2948 | 'wp_handle_upload', |
| 2949 | array( |
| 2950 | 'file' => $new_file, |
| 2951 | 'url' => $url, |
| 2952 | 'type' => $wp_filetype['type'], |
| 2953 | 'error' => false, |
| 2954 | ), |
| 2955 | 'sideload' |
| 2956 | ); |