PHP:对象上的array_map？

class ExampleObject {
    private $name;
    private $number;

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

    public function printInfo() {
        echo "姓名：$this->name\n";
        echo "数字：$this->number\n";
    }

    public function findName($name) {
        foreach ($this as $item) {
            if ($item == $name) {
                return $item;
            }
        }
        return null;
    }

    public function findNumberByProperty() {
        foreach ($this as $item) {
            if ($item->getName() == '张三') {
                return $item->getNumber();
            }
        }
        return null;
    }
}

$example = new ExampleObject('张三', 27);

// 对象上使用array_map函数
$arrayObj = $example->array_map(function ($item) {
    return "姓名: " . $item;
});

$nameStrings = array_values(array_map(function ($item) {
    return $item;
}, array($example->findName('张三')));

// 输出结果
foreach ($arrayObj as $name) {
    echo $name.PHP_EOL;
}
foreach ($nameStrings as $name) {
    echo $name.PHP_EOL;
}