Question

是否可以轻松快速地“将一个对象的属性分配给另一个对象”

class a {
    public $number_one;
    public $number_two;
    public $number_three;

    function __contruct() {
        //do stuff
    }
}

class b {
    public $my_var;

    function __contruct() {

        $instanc_a = new a();
        extract( $instance ); // but make these extracted object properties of class b????
                              // how? :-(
        echo $this->number_one;
    }
}

Answer 1

您可以使用get_object_vars将class a的公共（仅限）属性复制到当前对象：

class b {
    public $my_var;

    function __construct() {
        $instanc_a = new a();
        $vars = get_object_vars($instanc_a);
        foreach($vars as $name => $value) {
            $this->$name = $value;
        }

        echo $this->number_one;
    }
}

<强> See it in action

注意：您的代码中有一个拼写错误（两个“contruct”而不是“construct”），这会阻止事情按预期工作。

Answer 2

听起来您实际上希望class b扩展class a

class b extends a {
    public $my_var;

    function __construct () {
        parent::__construct();
        // Now $this refers to anything in class b, or if it doesn't exist here, looks to class a for it

        echo $this->number_one;
    }
}

将一个对象的属性分配给另一个对象

2 个答案: