具有__set和__get的类中的多维数组 [英] Multidimensional arrays in class with __set and __get

问题描述

我正在尝试编写一个包装$ _SESSION的简单类.这个想法是，我将能够从类中获取并引用$ _SESSION变量的值，并让__set和__get执行我需要的其他东西.

I'm trying to write a simple class that wrap $_SESSION. The idea is that I'll be able to set and get values from the class that will refer to the $_SESSION variable, having the __set and __get execute some other stuff I need.

我目前拥有的东西，还远远不能完成:

What I currently have, which is nowhere near complete:

class Session 
{
    // Property declarations
    public $data = array();

    /**
     * Class initialization
     */
    public function __construct() 
    {       
        if (!session_id()) {
            ini_set('session.cookie_lifetime', 0);
            ini_set('session.gc-maxlifetime', 0);

            session_start();
        }

        $this->data =& $_SESSION;
    }

    /**
     * Get session ID
     * @return string 
     */
    public function getId() 
    {
        return session_id();
    }
}

我正在尝试使其工作如下:

I'm trying to make it work as follows:

$session->images['directory'] = 1;

将与

$_SESSION['images']['directory'] = 1;

和

echo $session->images['directory'];

应依次输出:1

问题是，我想使用多维数组，如下所示:

$session->images['foo']['bar'] = 'works';

在SO和php.net的许多示例中都提供了常规的__set和__get函数，这是行不通的.

With regular __set and __get functions provided in many examples around SO and php.net, this doesn't work.

当然，在页面重新加载/导航后，我将能够使用它们各自的值访问相同的变量.

Ofcourse, after a page reload/navigation, I'll be able to access the same variables with their respective values.

我尝试过的搜索是Google和Stackoverflow，我一直使用"ArrayAcces"，但是似乎无法弄清楚如何将其用于我的问题.

What I've tried is search Google and Stackoverflow, I keep landing on "ArrayAcces", but cannot seem to figure out how to use that with my problem.

有人指出我正确的方向吗?

Anyone point me in the right direction?

推荐答案

我知道这里已经存在了一段时间-但这是您的答案.

I know this has been here for quite a while - but here is your answer.

最初，我认为您必须使用递归.但是后来我想起了PHP做一个引用指针.因此，我去了PHP在线文档中的信息:

Originally I thought you had to use recursion. But then I remembered that PHP does a reference pointer. So I went and looked up the information in the PHP online documentation at:

http://php.net/manual/en/language.references.php

这导致我尝试了一些尝试，然后我想到了以下内容.现在，我使用了in()和out()，因为我没有使用__set和__get对此进行测试.我只是想让它工作.所以这是两个函数:

This led me to try some things out and I came up with the following. Now, I used in() and out() because I wasn't testing this with __set and __get. I just wanted it to work. So here are the two functions:

public function in( $v, $d )
{
    $v = $this->get_id( $v );
    $a = explode( ".", $v );
    $b = &$this->info;
    foreach( $a as $k=>$v ){
        if( !isset($b[$v]) ){ $b[$v] = array(); $b = &$b[$v]; }
           else { $b = &$b[$v]; }
        }

    $b = $d;
    return true;
}
public function out( $v )
{
    $v = $this->get_id( $v );
    $a = explode( ".", $v );
    $b = &$this->info;
    foreach( $a as $k=>$v ){
        if( isset($b[$v]) ){ $b = &$b[$v]; }
            else { return false; }
        }

    return $b;
}

我用in("this.is.a.test"，5)和out("this.is.a.test")测试了上面的代码.产生了以下输出:

I tested the above code with in("this.is.a.test", 5) and out("this.is.a.test"). Which produced the following output:

In: 1
Out: 5
Array
(
    [cleric] => Array
        (
            [this] => Array
                (
                    [is] => Array
                        (
                            [a] => Array
                                (
                                    [test] => 5
                                )

                        )

                )

        )

)

(是的-我正在研究一个D& D程序，以便为我跟踪字符.)

(Yes - I'm working on a D&D program to keep track of characters for me.)

我在执行IN和OUT功能的上方设置了牧师"前缀.因此，第一行(牧师")来自前缀.:-)

I had set a prefix of "cleric" above where I did the IN and OUT functions. So the first line (the "cleric") is from the prefix. :-)

无论如何，这比使用递归执行此操作要快得多.我希望这有帮助.:-)或者，如果您已经从CakePHP中得到答案，那就太好了！:-)

Anyway, this is a LOT faster than using recursion to do this. I hope this helps. :-) Or if you've already got your answer out of CakePHP - that's great too! :-)

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