PHP __set 魔术方法未被调用

Question

我目前正在制作一个基于对象的 API。我有一个名为 Part 的抽象类，每个 child 都会扩展它。 Part 有一个 __set 函数，它将值存储在一个名为 $attributes 的 protected 数组中。但是，当我执行 $part->user = new User(etc...); 时，它不会运行 __set 函数。这是我的代码:

部分:

<?php

namespace Discord;

abstract class Part
{
    protected $attributes = [];

    public function __construct(array $attributes)
    {
        $this->attributes = $attributes;

        if (is_callable([$this, 'afterConstruct'])) {
            call_user_func([$this, 'afterConstruct']);
        }
    }

    /**
     * Handles dynamic get calls onto the object.
     * 
     * @param  string $name 
     * @return mixed
     */
    public function __get($name)
    {
        $str = '';

        foreach (explode('_', $name) as $part) {
            $str .= ucfirst($name);
        }

        $funcName = "get{$str}Attribute";

        if (is_callable([$this, $funcName])) {
            return call_user_func([$this, $funcName]);
        }

        if (!isset($this->attributes[$name]) && is_callable([$this, 'extraGet'])) {
            return $this->extraGet($name);
        }

        return $this->attributes[$name];
    }

    /**
     * Handles dynamic set calls onto the object.
     *
     * @param string $name 
     * @param mixed $value 
     */
    public function __set($name, $value)
    {
        echo "name: {$name}, value: {$value}";
        $this->attributes[$name] = $value;
    }
}

客户:

<?php

namespace Discord\Parts;

use Discord\Part;
use Discord\Parts\User;

class Client extends Part
{
    /**
     * Handles extra construction.
     * 
     * @return void
     */
    public function afterConstruct()
    {
        $request = json_decode($this->guzzle->get("users/{$this->id}")->getBody());

        $this->user = new User([
            'id'        => $request->id,
            'username'  => $request->username,
            'avatar'    => $request->avatar,
            'guzzle'    => $this->guzzle
        ]);
    }

    /**
     * Handles dynamic calls to the class.
     *
     * @return mixed 
     */
    public function __call($name, $args)
    {
        return call_user_func_array([$this->user, $name], $args);
    }

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

当我创建一个新的 Client 实例时，它会自动创建一个 User 实例并设置它。但是，我在 __set 中有测试代码，但它没有运行。

感谢任何帮助。

谢谢

Answer 1

The __set magic method is called only when a property is inaccessible from the context in which it is set .因为 Client 扩展 Part，Part 的属性都可以在 Client 中访问，所以魔术方法不是需要。