php 遍历成员变量

class Person {
    public $name;
    public $age;

    function __construct($name, $age) {
        $this->name = $name;
        $this->age = $age;
    }
}

$person = new Person("Alice", 30);

foreach ($person as $key => $value) {
    echo "$key: $value\n";
}

class Person {
    public $name;
    public $age;

    function __construct($name, $age) {
        $this->name = $name;
        $this->age = $age;
    }
}

$person = new Person("Bob", 25);
$attributes = get_object_vars($person);

foreach ($attributes as $key => $value) {
    echo "$key: $value\n";
}

class Person {
    private $name;
    private $age;

    function __construct($name, $age) {
        $this->name = $name;
        $this->age = $age;
    }

    public function getName() {
        return $this->name;
    }

    public function getAge() {
        return $this->age;
    }
}

$person = new Person("Charlie", 35);

echo "Name: " . $person->getName() . "\n";
echo "Age: " . $person->getAge() . "\n";

class Counter {
    public $count = 0;

    function increment() {
        $this->count++;
    }
}

$counter = new Counter();

// 创建副本以避免遍历过程中状态改变
$counterCopy = clone $counter;

foreach ($counterCopy as $key => $value) {
    echo "$key: $value\n";
    $counter->increment(); // 原对象状态改变，但不影响副本
}