今天查看yii源碼，發現yii/base/Model中的attribute()方法是通過反射獲取對象的public non-static屬性。記得以前看到的代碼都是用get_object_vars()這個函數獲取的，昨天查看php文檔，發現還可以用foreach遍歷對象屬性。于是寫個例子練習下。
class TestClass { PRivate $a; protected $b; public $c; public $d; public static $e; private function funcA() { } protected function funcB() { } public function funcC() { } public function getPropertyMethodOne() { echo "[get_object_vars]", PHP_EOL; $vars = get_object_vars($this); foreach ($vars as $k => $v) { echo $k, ' => ', $v, PHP_EOL; } } public function getPropertyMethodTwo() { echo "[foreach object]", PHP_EOL; foreach ($this as $k => $v) { echo $k, ' => ', $v, PHP_EOL; } } public function getPropertyMethodThree() { echo "[reflection]", PHP_EOL; $class = new ReflectionClass($this); foreach ($class->getProperties(ReflectionProperty::IS_PUBLIC) as $property) { if (!$property->isStatic()) { echo $property->getName(), ' => ', $property->getValue($this), PHP_EOL; } } }}測試代碼一$obj = new TestClass();echo "[get_object_vars]", PHP_EOL;$vars = get_object_vars($obj);foreach ($vars as $k => $v) { echo $k, ' => ', $v, PHP_EOL;}echo "[foreach object]", PHP_EOL;foreach ($obj as $k => $v) { echo $k, ' => ', $v, PHP_EOL;}echo "[reflection]", PHP_EOL;$class = new ReflectionClass($obj);foreach ($class->getProperties(ReflectionProperty::IS_PUBLIC) as $property) { if (!$property->isStatic()) { echo $property->getName(), ' => ', $property->getValue($obj), PHP_EOL; }}輸出：
[get_object_vars]c => d => [foreach object]c => d => [reflection]c => d =>可見，當著三種方法用在類的外部時，結果是一樣的。get_object_vars()和foreach是獲取到的是對象的public non-static屬性，而通過反射的話則需要手動篩選出public non-static屬性。
測試代碼二$obj = new TestClass();$obj->getPropertyMethodOne();$obj->getPropertyMethodTwo();$obj->getPropertyMethodThree();輸出
[get_object_vars]a => b => c => d => [foreach object]a => b => c => d => [reflection]c => d =>可見，get_object_vars()和foreach用在類內部時，private、protected、public的實例屬性都能獲取到。反射就不用說了，通過手動篩選，各種類型的屬性都能獲取到。
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