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copied!<p>Actually, when you calling <code>$property->foo->bar</code> and <code>$property</code> class have magic __get method, you can verify only <code>foo</code> property and throw error only for it.</p> <p>But if your <code>foo</code> is also an instance of the same class (or similar class with the same magic <code>__get</code> method) you can also verify <code>bar</code> property and throw the next error.</p> <p>For example:</p> <pre><code>class magicLeaf { protected $data; public function __construct($hashTree) { $this->data = $hashTree; } // Notice that we returning another instance of the same class with subtree public function __get($k) { if (array_key_exists($k, $this->data)) { throw new Exception ("Property $name is not defined"); } if (is_array($this->data[$k])) { // lazy convert arrays to magicLeaf classes $this->data[$k] = new self($this->data[$k]); } return $this->data[$k]; } } </code></pre> <p>And now just example of using it:</p> <pre><code>$property = new magicLeaf(array( 'foo' => 'root property', 'bar' => array( 'yo' => 'Hi!', 'baz' => array( // dummy ), ), )); $property->foo; // should contain 'root property' string $property->bar->yo; // "Hi!" $property->bar->baz->wut; // should throw an Exception with "Property wut is not defined" </code></pre> <p>So now you can see how to made it almost like you want.</p> <p>Now just modify a little your <code>__construct</code> and magic <code>__get</code> methods and add new param to know where we are at each level:</p> <pre><code>... private $crumbs; public function __construct($hashTree, $crumbs = array()) { $this->data = $hashTree; $this->crumbs = $crumbs; } public function __get($k) { if (array_key_exists($k, $this->data)) { $crumbs = join('->', $this->crumbs); throw new Exception ("Property {$crumbs}->{$name} is not defined"); } if (is_array($this->data[$k])) { // lazy convert arrays to magicLeaf classes $this->data[$k] = new self($this->data[$k], $this->crumbs + array($k)); } return $this->data[$k]; } ... </code></pre> <p>I think it should works like you want.</p>

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