将在类中创建的变量声明为全局变量

Question

How do I make a variable that is created within a class function available outside of that class function?

For instance, the constructor of my main class creates an instance of the logging class. I want this $log variable to be available in other classes (using the global keyword) I would assume.

Is this possible?

Answer 1

You can use static.

class Main
    {
    static private $log;

    public function __construct()
        {
        self::$log = new Log();
        }

    static public function getLog()
        {
        return self::$log;
        }
    }

Now you can get access to $log everywhere using

Main::getLog();