嵌套对象之间的引用（PHP4） [英] References between nested objects (PHP4)

问题描述

你好


在内容管理工具中，我从类内部调用类，以便将管理功能与仅显示功能分开：

： br />

班级书籍

{

var $ title;

var $ author;

var $ adminfunctions;


功能书（$ admin = false）

{

if（$ admin） {

$ this-> adminfunctions =& new book_admin（$ this）;

}

}


function display_book（）

{

返回$ this-> author。"："。$ this-> title;

}

}


class book_admin

{

var $ boss;


function book_admin（& $老板）

{

$ this-> boss = $ boss;

}


function update_book（$ author，$ title）

{

$ this-> boss-> author = $ author;

$ this - > boss-> title = $ title;

}


[很多其他方法]

}


管理员代码如下：


$ book =&新书（true）;

$ book-> adminfunctions-> update_book（" Michael Crichton"，" Jurassic Parc"）;

echo $ book- > display_book（）;


如你所见，有一个圆圈参考，因为book_admin :: boss是一个参考

重新预订。我认为这很糟糕，实际上有一些问题

我怀疑是在那里发生的。


还有另一种可能性来访问调用对象的属性？我没有找到类似于parent :: property语法的语法，而且我不能使用继承，因为已经存在垂直继承（例如页面

扩展图书扩展库...），并且不可能继承两个

类。


谢谢你提示！

Markus

Hello

In a content administration tool I call classes from inside classes in order
to separate the admin functions from the display-only functions:

class book
{
var $title;
var $author;
var $adminfunctions;

function book($admin = false)
{
if ($admin) {
$this->adminfunctions =& new book_admin($this);
}
}

function display_book()
{
return $this->author.": ".$this->title;
}
}

class book_admin
{
var $boss;

function book_admin(&$boss)
{
$this->boss = $boss;
}

function update_book($author, $title)
{
$this->boss->author = $author;
$this->boss->title = $title;
}

[lots of other methods]
}

The admin code will be something like:

$book =& new book(true);
$book->adminfunctions->update_book("Michael Crichton", "Jurassic Parc");
echo $book->display_book();

As you see there is a circle reference, as book_admin::boss is a reference
back to book. I assume this is bad, and actually there are some problems
that I suspect are originated there.

Is there another possibility to access properties of the calling object? I
did not find any syntax similar to the parent::property syntax, and I can''t
use inheritance, as there is already a vertical inheritance (such as page
extends book extends library...), and it is not possible to inherit two
classes.

Thanks for a hint!
Markus

推荐答案

title;

var

title;
var

作者;

var

author;
var

adminfunctions;


函数手册（

adminfunctions;

function book(

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