在php中的std对象中添加方法 [英] Add method in an std object in php

问题描述

是否可以通过这种方式添加方法/功能，例如

Is it possible to add a method/function in this way, like

$arr = array(
    "nid"=> 20,
    "title" => "Something",
    "value" => "Something else",
    "my_method" => function($arg){....}
);

或者也许是这样

$node = (object) $arr;
$node->my_method=function($arg){...};

如果可能的话，我该如何使用该功能/方法?

and if it's possible then how can I use that function/method?

推荐答案

您不能将方法动态添加到stdClass并以常规方式执行.但是，您可以做一些事情.

You cannot dynamically add a method to the stdClass and execute it in the normal fashion. However, there are a few things you can do.

在第一个示例中，您正在创建关闭.您可以通过发出以下命令来执行关闭操作:

In your first example, you're creating a closure. You can execute that closure by issuing the command:

$arr['my_method']('Argument')

您可以创建一个stdClass对象并将其闭包分配给其属性之一，但是由于语法冲突，您无法直接执行它.相反，您将必须执行以下操作:

You can create a stdClass object and assign a closure to one of its properties, but due to a syntax conflict, you cannot directly execute it. Instead, you would have to do something like:

$node = new stdClass();
$node->method = function($arg) { ... }
$func = $node->method;
$func('Argument');

尝试

$node->method('Argument')

将生成错误，因为stdClass上不存在任何方法方法".

would generate an error, because no method "method" exists on a stdClass.

请参见 SO答案使用魔术方法 __ call .

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