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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 |
|---|---|
| 939 | * @param array $upload { |
| 940 | * Array of upload data. |
| 941 | * |
| 942 | * @type string $file Filename of the newly-uploaded file. |
| 943 | * @type string $url URL of the newly-uploaded file. |
| 944 | * @type string $type Mime type of the newly-uploaded file. |
| 945 | * } |
| 946 | * @param string $context The type of upload action. Values include 'upload' or 'sideload'. |
| 947 | */ |
| 948 | return apply_filters( |
| 949 | 'wp_handle_upload', |
| 950 | array( |
| 951 | 'file' => $new_file, |
| 952 | 'url' => $url, |
| 953 | 'type' => $type, |
| 954 | ), |
| 955 | 'wp_handle_sideload' === $action ? 'sideload' : 'upload' |
| 956 | ); |
| 957 | } |