如何在整个课堂上使变量成为全局变量 [英] How to make variable global across entire class

问题描述

一个非常简单的问题，是否有可能使从类外部获取的变量全局成为整个类，这样我就不必在每个方法的开头都调用全局$ variable ？

Very simple question, is it possible to make a variable that is retrieved from outside of a class, 'global' to the whole class so that I do not have to call the 'global $variable' at the beginning of each method?

这是我目前正在做的事情：

class test{
    public function testing(){
        global $globalVariable,

        // Do something
    }
    public function testing_two(){
        global $globalVariable,

        // Do something
    }
}

换句话说，我可以将变量导入到构造函数中，从而使整个类都可以访问它们，而不必为每个方法调用全局吗？

更新

不知道我是否清楚我想实现。请参见以下内容：

Not sure if I have made it too clear with what I would like to achieve. Please see below:

$globalVariable = 'hello';

class test{
    public function testing(){
        global $globalVariable,

        // Do something
    }
    public function testing_two(){
        global $globalVariable,

        // Do something
    }
}

推荐答案

要清除操作方法：

您最多可能想做这样的事情
include（'database.php'）; 。那时，您包含的所有内容都是脚本的全局变量。现在，如果您具有上述类，则添加一个构造函数：

You most likely want to do something like this include('database.php');. At that very point everything you included there is global to your script. Now if you have a class like the above you add a constructor:

class testclass
{
    private $db;

    public function __construct($db)
    {
       $this->db = $db;
    }

    public function yourmethod()
    {
       $this->db->prepare(); // And so on
    }
}

让我们假设您的全局变量为在全局范围内称为$ db。您现在可以使用 new testclass（$ db）; 构造对象。现在，当您在所有方法中都使用 $ this-> db 时，则无需使用全局语句。

Let's assume your global variable is called $db in the global scope. You can just construct your object now using new testclass($db);. When you now use $this->db in all your methods there is no need to use the global statement.

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