Description:
------------
With Reflection, it is possible to get and set static properties in classes, 
even 
when they are private or protected. This should also be possible for static 
variables inside functions and methods. There is a method 
ReflectionFunctionAbstract::getStaticVariables() that returns the names and 
values 
of static variables inside the function. In my opinion, there should also be a 
function ReflectionFunctionAbstract::setStaticVariable(). 

I'd also like to mention this bug: https://bugs.php.net/bug.php?id=51581 - It 
was 
declined about two years ago but I think it should be fixed. I suggested in a 
comment that a solution for the increased memory usage could be a ini-setting 
(like "reflection.track_static_properties") that enables (should probably be 
disabled by default) the tracking of the default values of static properties. If 
this could be done, I also suggest adding a similar function to retrieve the 
default values of static variables in functions, for example 
ReflectionFunctionAbstract::getDefaultStaticVariables().