PHP通过引用修改数组元素

I have a large data-set that I'm checking the contents of; I do this validation while creating an internal array of the data; to avoid looping over the array again later, I would like the validation to change the contents of the array. Now the problem is that I'm calling the validation routines through call_user_func and this seems to pose some problems with passing by reference. Or maybe I'm doing something else wrong.I have a large data-set that I'm checking the c