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                什么是反射? 動態獲取 類的方法、屬性、參數,注釋 等 信息以及動態調用對象的方法的功能稱為反射API。 反射是操縱面向對象范型中元模型的API,其功能十分強大,可幫助我們構建復雜,可擴展的應用。 反射類/函數的功能 可以獲取類的一切信息,包括: 1. 類基本信息(類名、是否是抽象類、是否可實例化、類是否為final或者abstract) 2. 類的方法、方法是否存在、方法返回值、方法的注釋、Method Names 3. 類的屬性,靜態屬性,常量 4. 所在命名空間 Namespace $boy = new HandsonBoy(); echo $boy->name.'<br />'; $boy->hair = 'short'; 用反射來獲取類的屬性 $reflect = new ReflectionObject($boy); 實例化這一步最重要 $props = $reflect->getProperties(); //反射遍歷屬性 foreach ($props as $prop){ var_dump($prop->getName().PHP_EOL); } $methods = $reflect->getMethods(); foreach ($methods as $method){ var_dump($method->getName().PHP_EOL); } ``` <?php class HandsonBoy { private $name = 'gao'; private $age = 23; public function __set($name, $value) { echo '您正在設置私有屬性'.$name.'<br>'; $this->name = $value; } public function __get($name) { if (!isset($this->$name)) { echo '未設置'.$name; $this->name = '正為你設置默認值'; } return $this->name; } private function index() { echo 'hhhh'; } } $boy = new HandsonBoy(); //echo $boy->name; $reflect = new ReflectionObject($boy); $props = $reflect->getProperties(); foreach ($props as $prop) { var_dump($prop->getName().PHP_EOL); } $methods = $reflect->getMethods(); foreach ($methods as $method){ if ($method->getName() == 'index') { $method->getName(); } } ```
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