$vb3_index["$table"]["$index[Key_name]"] you would want that over $vb3_index["$table"][$index['Key_name']] as if $index['Key_name'] is a negative integer you would get an error notice.
Which you dont get in the latest versions of PHP as I just tested in there :P
Also PHP will treat what is in there as a string anyway.
The long line is due to indenting and is perfectably readable.
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