Description:
------------
Currently there is no way in PHP to control the scope/lifetime of a variable. In C# there is an interface called IDisposable which allows for explicit disposal by using a 'using' keyword. 

I'm proposing a explicit destructor to be called in PHP in a similar manner.
'using' should behave like an 'if' statement - it should not require curly brackets for a single command inside in it, multiple commands should be wrapped in curly brackets.

Test script:
---------------
<?
using($t=new Div)	//no semicolon since this should be like an 'if'
	echo 'inside';
echo 'outside';
//
//
//---class Div---------------
class Div{
	function __construct(){
		echo '<div>';
	}
	function __destruct(){
		echo '</div>';
	}
}
?>

Expected result:
----------------
if 'using' was implemented, the example code above should output:
"<div>inside</div>outside"

Actual result:
--------------
'using' currently will display an error:
PHP Parse error:  syntax error, unexpected 'echo' (T_ECHO)
//or depending on a semicolon(just to give you you a real failure reason)
PHP Fatal error:  Uncaught Error: Call to undefined function using()


without 'using' it will say "<div>insideoutside</div>" - last </div> will be displayed at the very end of script probably when PHP disposes all variables.