Description:
------------
In some cases can i need this feature.
I think, this was a possible way to made code to running with modern features PHP >= 7 and on old Versions. Or to write fine granular code. Or transparence and clearer code.


The preprocessor directives should recognized following:
- #<preprocessor type> <preprocessor identifier> <
- <preprocessor type>: #IF, #IFNOT followed by #ENDIF. Between ca #ELSE or/and #ELSEIF
- <preprocessor identifier>: PHPVAR (PHP Version), OSVAR (OS Version), OS (OS Name), HTTPSRV (Webserver Name) and CLI (if true if running via cli command). It should possible to concatenate with AND. 
- <comparer>: <,<=,>,>=,= (= if the default comparer an is not needed to write it)
- <compare value>: will always interpreted as string or number for the compare var



Is there this feature planned or on your todo list :)

Test script:
---------------
My idea was so, e.g. class function:

#IF PHPVER >= 8.0
public function getAndCatchMethod(string $methodname) : callable on throws \MyException
#ELSE
public function getAndCatchMethod(string $methodname) : callable
#ENDIF
{
    return [$this, $methodname];
}

Expected result:
----------------
Code dynamical builded on preprocessor directives.

#IF PHPVER >= 8.0
public function getMagic(string $value = '') : callable on throws \MyException
{
   # this new killer feature will catching the Exception automatically to given Exception Class without to need try..catch, if method called ;)
   return [$this, $methodname];
}

Class->getAndCatchMethod('test')
MyException::catch() {}

#ELSE

public function getAndCatchMethod(string $methodname) : callable
{
   # regular exception catching
   return [$this, $methodname];
}

try { Class->getAndCatchMethod('test') } catch (...) { }

Actual result:
--------------
Nothing. This will not working at this time.