无论如何在PHP中定义公共或私有或受保护的类 [英] is there anyway to define public or private or protected classes in PHP

问题描述

有没有办法像 java 一样在命名空间中创建公共或私有或受保护的类?

Is there anyway to create public or private or protected classes in a namespace just like java?

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namespace foo;

public class Account {
  .......
}


private class PrivateAccount {
 .......
}

请让我知道是否有任何解决方法可以在 PHP 中执行此操作.

please let me know if there is any workaround to do this in PHP.

推荐答案

通常您所做的是将类的构造函数声明为私有.然后，您可以在类中创建一个单独的静态函数，该函数将执行一些检查(即检查命名空间)并通过调用私有构造函数有条件地返回类的实例.这也是您实现单例的典型方式.

Typically what you do is declare the constructor of the class private. Then you can create a separate static function in the class that will do some checks (i.e. check the namespace) and conditionally return an instance of the class by calling the private constructor. This is also typically how you implement singletons.

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