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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 |
---|---|
883 | * @param array $upload { |
884 | * Array of upload data. |
885 | * |
886 | * @type string $file Filename of the newly-uploaded file. |
887 | * @type string $url URL of the uploaded file. |
888 | * @type string $type File type. |
889 | * } |
890 | * @param string $context The type of upload action. Values include 'upload' or 'sideload'. |
891 | */ |
892 | return apply_filters( |
893 | 'wp_handle_upload', |
894 | array( |
895 | 'file' => $new_file, |
896 | 'url' => $url, |
897 | 'type' => $type, |
898 | ), |
899 | 'wp_handle_sideload' === $action ? 'sideload' : 'upload' |
900 | ); |
901 | } |