spl_autoload_register Throws an Error in My Production Server

[eluser]Aken[/eluser]
num_rows() needs to be called on a query result. One of two things is likely: A) Your query is improperly formatted and/or failed, so it returned something other than a standard result object; B) You retrieved a result row/set (such as result(), row(), etc.) and you're trying to use num_rows() on that by mistake.