How to solve a warning in phpwordpress

A Warning for phpwordpress: call_user_func_array () expectsparameter1tobeavalidcallback, function 'importfile' notfoundo php wordpress
Warning: call_user_func_array () expects parameter 1 to be a valid callback, function 'portfile' not found or invalid function name in/home/wwwroot/queues on line 395

How to remove this warning, or how to set it to prevent it from being displayed.

------ Solution --------------------
What have you changed? Locate whether the first parameter 'importfile' in the 395 row call_user_func_array () function is written incorrectly (case sensitive ).
------ Solution --------------------
Invalid return value importFile function not found
------ Solution --------------------
Discussion

Solution: after php is upgraded to 5.4, the solution is to find display_errors = Off in the php configuration file php. ini (change on to Off and then OK)

------ Solution --------------------
Discussion

Indeed:

In wordpress, you can use @ ini_set ('display _ errors ', 'off') to disable error output.

It is much more convenient than in php. ini.