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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 |
---|---|
922 | * @param array $upload { |
923 | * Array of upload data. |
924 | * |
925 | * @type string $file Filename of the newly-uploaded file. |
926 | * @type string $url URL of the uploaded file. |
927 | * @type string $type File type. |
928 | * } |
929 | * @param string $context The type of upload action. Values include 'upload' or 'sideload'. |
930 | */ |
931 | return apply_filters( |
932 | 'wp_handle_upload', |
933 | array( |
934 | 'file' => $new_file, |
935 | 'url' => $url, |
936 | 'type' => $type, |
937 | ), |
938 | 'wp_handle_sideload' === $action ? 'sideload' : 'upload' |
939 | ); |
940 | } |