php检查子类中的方法是否被覆盖 [英] php check if method overridden in child class

问题描述

是否可以检查方法是否已被PHP中的子类覆盖?

Is it possible to check whether or not a method has been overridden by a child class in PHP?

<!-- language: lang-php -->

class foo {
    protected $url;
    protected $name;
    protected $id;

    var $baz;

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

    function createTable($data) {
        // do default actions
    }
}

儿童班:

class bar extends foo {
    public $goo;

    public function createTable($data) {
        // different code here
    }
}

当遍历定义为此类成员的一组对象时，我该如何检查哪个对象具有新方法而不是旧方法?是否存在诸如method_overridden(mixed $object, string $method name)之类的功能?

When iterating through an array of objects defined as members of this class, how can I check which of the objects has the new method as opposed to the old one? Does a function such as method_overridden(mixed $object, string $method name) exist?

foreach ($objects as $ob) {
    if (method_overridden($ob, "createTable")) {
        // stuff that should only happen if this method is overridden
    }
    $ob->createTable($dataset);
}

我知道模板方法模式，但我想让程序的控件与类和方法本身分开.我需要诸如method_overridden之类的功能来完成此任务.

I am aware of the template method pattern, but let's say I want the control of the program to be separate from the class and the methods themselves. I would need a function such as method_overridden to accomplish this.

推荐答案

检查声明的类是否与对象的类匹配:

Check if the declaring class matches the class of the object:

$reflector = new \ReflectionMethod($ob, 'createTable');
$isProto = ($reflector->getDeclaringClass()->getName() !== get_class($ob));

PHP手册链接:

• ReflectionMethod
• ReflectionProperty

• ReflectionMethod
• ReflectionProperty

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