在PHP类中全局使用局部变量

class MyClass {
    public $globalVar;

    public function setGlobalVar($value) {
        $this->globalVar = $value;
    }

    public function getGlobalVar() {
        return $this->globalVar;
    }
}

$obj = new MyClass();
$obj->setGlobalVar('Hello World');
echo $obj->getGlobalVar(); // 输出: Hello World

class MyClass {
    public static $globalVar;

    public static function setGlobalVar($value) {
        self::$globalVar = $value;
    }

    public static function getGlobalVar() {
        return self::$globalVar;
    }
}

MyClass::setGlobalVar('Hello World');
echo MyClass::getGlobalVar(); // 输出: Hello World

class MyClass {
    private $globalVar;

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

    public function getGlobalVar() {
        return $this->globalVar;
    }
}

$globalVar = 'Hello World';
$obj = new MyClass($globalVar);
echo $obj->getGlobalVar(); // 输出: Hello World