ArrayIterator::uksort Sort by keys using a user-defined comparison function &reftitle.description; public voidArrayIterator::uksort callablecmp_function This method sorts the elements by keys using a user-supplied comparison function. ¬e.sort-unstable; &reftitle.parameters; cmp_function &return.callbacksort; &callback.cmp; &reftitle.returnvalues; &return.void; &reftitle.seealso; ArrayIterator::ksort ArrayIterator::uasort uksort