Description:
------------
In the example function test2 is declared in function test.
Function test2 declares the variable $test as global.
$test is available inside test2 and outside the function but crucially not in function test.

this may seem strange practice to declare a function within a function. but it can be useful in a function or class-based template system which is including other files and projects like wordpress.
see: http://wordpress.org/support/topic/288455

Reproduce code:
---------------
<?php
function test()
{
	function test2()
	{
		global $test;
		$test='nads'."\n";
	}
	
	test2();	
	print $test; //doesn't work
}

test();
print $test; //works
?>

Expected result:
----------------
nads
nads

Actual result:
--------------
nads