将过程PHP转换为面向对象的PHP

1) It is my understanding that one class is used as a blueprint for any number of objects,but any one class represents only one object,never more than one. So one class could represent a player,but never multiple players.

通常,您还将拥有表示对象集合的类,例如一个“玩家”类,可用于从所有玩家的集合中检索单个玩家：

$players = new Players();
$john = $players->findByName("john");

2) Since I will have quite a few different classes to include,do I use a “Loader” class to load them all using spl_autoload_register or do I just use spl_autoload_register in the program files for my application?

这很大程度上取决于项目的复杂性.一个简单的自动加载器功能通常是足够好的,但你可以看看Zend Framework Autoloader class.

3) Some of my classes depend on other classes. I’ve never encountered this before,so I honestly do not know the answer. If I include all the classes in my main program file,but my player class does not include the class which it needs to function,will the player class work since the main program has included the class which player depends on?

是.但是,通过自动加载,您根本不需要担心这一点.如果不使用自动加载,最好在定义类的文件中包含必需的类(使用require_once()以避免多次包含同一文件).

4) There are multiple cases where I will need to work on the objects I am creating. I am wondering how I should do that. For example,in my Player class I will sometimes need to send something from one Player to the other Player. So,do I implement a static method in the Player class that takes two Players as parameters and does the transfer or do I do something else?

静态方法几乎总是错误的方法.普通方法属于一个实例(即特定玩家),静态方法属于该类,即玩家的一般“想法”.如果你需要将东西从一个玩家转移到另一个玩家,为什么不这样实现：

class Player {
    public function transferMoney(Player $recipient,$amount) { ... }
}

$tom = new Player("tom");
$marc = new Player("marc");

$tom->transferMoney($marc,500);

5) I have a lot of methods that don’t really belong to any one instance of a class nor are they really appropriate as static methods. Should these be declared in their own class as static methods as Common or similar? What is the done in practice in this situation?

我无法合理地回答这个问题.但是,PHP中仍然存在普通函数,这些函数似乎是这种情况的最佳方法.然而,如果你正确地做OOP,你很可能永远不会遇到这样的问题.这通常是您的类设计的一个问题,这使您认为这些方法不属于任何对象.

6) I’d like to learn how to use namespaces,but my code will never be used by others and I will never use anyone else’s code in my application. Are namespaces an unncessary addition in my application or would it be a good idea to learn how to use them? Regardless,does one application have one namespace (the application name?) or does each class belong to it’s own namespace?

命名空间很棒但是如果没有它们,你的代码可能会很好.由于命名空间可以嵌套,因此每个组件通常都有一个顶级命名空间和子命名空间.

7) Lastly,is it common to have one class for database connections and also a class for network methods? My application needs both. I think the main problem I am having with converting my code to use object-oriented techniques is determining which methods to put where,as currently they are all in one monolithic file.

这取决于您如何建模您的实际情况.如果数据库连接和“网络”是两个不同的东西,那么两个类就是可行的方法.