<?php class Tree { public $children = []; public $data; public function __construct($data, $children) { $this->data = $data; $this->children = $children; } } $children1 = new Tree(34, []); $children2 = new Tree(70, []); $rootNode = new Tree(12, [$children1, $children2]);
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Value for `_results` contains invalid data `array`