### foreach方法 所以，對象其實就是有“生命力”的數組 . **前提是這些屬性是public,如果是私有的或者是受保護的,將無法遍歷**. ~~~ class Person{ public $name; public $age; public $height; public $weight; public function __construct($name, $age, $height, $weight) { $this->name = $name; $this->age = $age; $this->height = $height; $this->weight = $weight; } } $p = new Person('jack',20,150,176); foreach($p as $key => $value){ echo $key.'-->'.$value; } ~~~ ~~~ name-->jack age-->20 height-->150 weight-->176 ~~~ ### 定義方法遍歷非public屬性 ~~~ class Person{ private $name; private $age; private $height; private $weight; public function __construct($name, $age, $height, $weight) { $this->name = $name; $this->age = $age; $this->height = $height; $this->weight = $weight; } public function myForeach() { foreach($this as $key => $value){ echo $key . '-->' . $value; } } } $p = new Person('jack', 20, 150, 176); $p->myForeach(); ~~~ ~~~ name-->jack age-->20 height-->150 weight-->176 ~~~ ### 對象自定義遍歷