如何在同一个类的静态方法中访问类的受保护变量？

Below is the scenario:

class PopupsAdminSettingsPage extends AbstractAdminSubPage
{
    protected $menuTitle = 'Settings';

    public static function getMenuTitle()
    {
        /* I want to access $menuTitle property here ...
    }
}

I want to access the $menuTitle property inside the static function getMenuTitle so that I could access the protected variable outside of the Class PopupsAdminSettingsPage too.

You can do it like this:

public static function getMenuTitle(&$PopupsAdminSettingsPage)
{
  echo $PopupsAdminSettingsPage->menuTitle
}

But that doesn't mean it's right to do this. You can't access it for a reason

In Static methods context there's no $this

So that should be a big red sign in your implementation