005+ Fatal error: Uncaught TypeError: Argument 2 passed to usort() must be callable, string given in %s/usort_error2.php:34
006+ Stack trace:
007+ #0 %s/usort_error2.php(34): usort(Array, 'non_existent')
008+ #1 {main}
009+ thrown in %s/usort_error2.php on line 34
005- Warning: usort() expects parameter 2 to be a valid callback, function 'non_existent' not found or invalid function name in %s on line %d
006- NULL
007-
008- -- Testing usort() function with non-existent compare function and extra argument --
009-
010- Warning: usort() expects exactly 2 parameters, 3 given in %s on line %d
011- NULL
012- ===DONE===