Using context in php to use class in "right" places

Say I have class Foo with static public method bar(), and I want to make restriction in order to use this method in "right" places.

The solution I came so far is:

interface FooContext {}

class Foo
{
    static public function bar(FooContext $context)
    {
      // some logic
    }
}

class Execution implements FooContext 
{
    Foo::bar($this);
}

so I can be sure that Foo::bar will be used only in safe places.

Is there any better solutions resolving this problem?

(Assuming that I'm not using Dependency Injection)