Description:
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I have been writing some code to handle Modified Pre-ordered Tree Traversal data, and the sole purpose of the code is to avoid recursive calls. The code works, but I found I had to place a line in that should not need to be there.

My arrays are nested, but by reference rather than as usual. Each item with children has a member array called 'children', with each value bein a reference to a child. Each child has a member called 'parent', which has a reference to the parent array. The problem is, my code (which functions by using internal array pointers) doesn't work properly until the array is copied by reference back into itself. The code posted on my website (which will remain up as long as I don't have an answer) demonstrates this, though it needs a populated database with an MPTT tree to see it in action.

The line $array=&$array['children'][0]['parent']; should not need to be there. But, if you remove it, the code doesn't function correctly until after its natural cycle brings it back up to the root node, which effectively mimics the by reference assignment. At this point in the code the counter is already thrown off.

Note that $array=&$array; did not seem to work to fix the problem.

Reproduce code:
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http://www.coder7.com/mptt.phps

Expected result:
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The code generates the expected output, but only because a work-around has been put in.