PHP 将所有对象属性复制到此

发布于 2024-12-24 02:59:58 字数 339 浏览 7 评论 0原文

我在 PHP 中有一个 MyObject 类型的对象。

$myObject instanceof MyObject

现在，在class MyObject中，有一个非静态函数，在那里，我使用了对“me”的引用，就像$this一样，但我也有那里有另一个物体。

是否可以在不执行 $this = $myObject 的情况下实现或多或少相同的效果，例如 set_object_vars($this, get_object_vars($myObject))？

原文

I have an object in PHP, of the type MyObject.

$myObject instanceof MyObject

Now, in the class MyObject, there is a non-static function, and in there, I use the reference to "me", like $this, but I also have another object there.

Is it possible, without doing $this = $myObject, to achieve more or less the same effect, like something of the sort set_object_vars($this, get_object_vars($myObject))?

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潜移默化 2024-12-31 02:59:58

<?php

class MyObject
{
    public function import(MyObject $object)
    {   
        foreach (get_object_vars($object) as $key => $value) {
            $this->$key = $value;
        }
    }   
}

我猜会做你想做的事，但你应该注意以下几点：

get_object_vars 只会找到非静态属性
get_object_vars 只会找到可访问的属性根据范围

根据范围部分非常重要，可能值得更多解释。您是否知道 PHP 中的属性范围是类相关而不是实例相关？

这意味着在上面的示例中，如果您在 MyObject 中有一个 private $bar 属性，get_object_vars 会看到它，因为您处于MyObject 类的实例。如果您尝试导入另一个类的实例，这显然不起作用。

<?php

class MyObject
{
    public function import(MyObject $object)
    {   
        foreach (get_object_vars($object) as $key => $value) {
            $this->$key = $value;
        }
    }   
}

Will do what you want I guess, but you should be aware of the following:

get_object_vars will only find non-static properties
get_object_vars will only find accessible properties according to scope

The according to scope part is quite important and may deserve a little more explanation. Did you know that properties scope are class dependent rather than instance dependent in PHP?

It means that in the example above, if you had a private $bar property in MyObject, get_object_vars would see it, since you are in an instance of a MyObject class. This will obviously not work if you're trying to import instances of another class.

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半岛未凉 2024-12-31 02:59:58

@Geoffrey Bachelet，我们可以改进这一点：

class MyObject
{
    //object or array as parameter
    public function import($object)
    {   
        $vars=is_object($object)?get_object_vars($object):$object;
        if(!is_array($vars)) throw Exception('no props to import into the object!');
        foreach ($vars as $key => $value) {
            $this->$key = $value;
        }
    }   
}

不同之处在于，您可以传递普通数组（哈希表）以及对象。想象一下来自数据库的一些数据的例子。

@Geoffrey Bachelet we can improve this:

class MyObject
{
    //object or array as parameter
    public function import($object)
    {   
        $vars=is_object($object)?get_object_vars($object):$object;
        if(!is_array($vars)) throw Exception('no props to import into the object!');
        foreach ($vars as $key => $value) {
            $this->$key = $value;
        }
    }   
}

The difference is here that you can pass an ordinary array (hashtable) as well as an object. Think in example about some data coming from the database.

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