> i'm trying to build a class that sorts a multidimensional array.
> I'm using the php function "usort".
>
> I declared the comparision function as a method of my class but i'm unable to give it as argument to the function usort.
>
> this "usort($this->arr, $this->cmpi)" gaves the following error: usort() [function.usort]: Invalid comparison function
>
> i tried to do "usort($this->arr, 'cmpi')" but it does not work either.

If it's anything like other functions, try this:

usort($this->arr, array($this, 'cmpi'));

--
Richard Heyes

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