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Task: Build Array Tree from Flat Array List in PHP

Task: Build Array Tree from Flat Array List in PHP: a task in Terminal-Lego-15k (Harbor dataset). You need to write a PHP function that converts a flat array list with parent-child relationships into a nested tree structure.

The task

You need to write a PHP function that converts a flat array list with parent-child relationships into a nested tree structure.

Part of PrimeIntellect/Terminal-Lego-15k.