Description:
------------
I noticed a limitation in (at least) latest version of php.

It's impossible to iterate the const or static member of a 
class.

The only possible (but REALY too hard) whould be to use the 
reflector propriety.

I don't know if it's a feature to add or a missing 
explanation in documentation.

But if it's not supported at all, it should be reported as 
a lack of feature in documentation and scheduled for php6 ?

Reproduce code:
---------------
<?php
//The class
class someclass {
	//The constant
	const someconst = 'somevalue';
	//The public static member
	public static $somepublicstatic = 'somevalue';
	//The protected static member
	protected static $someprotectedstatic = 'somevalue';
	//The private static member
	private static $someprivatestatic = 'somevalue';

	//A function to list static or const members
	public static function somefunction()
	{
		//Try to iterate const or static member
		foreach(self as $key => $value)
			echo "$key = $value\n";
	}
}

echo "static function list:\n";
someclass::somefunction();
echo "external list:\n";
foreach(someclass as $key => $value)
	echo "$key = $value\n";
?>

Expected result:
----------------
static function list:
someconst = somevalue
somepublicstatic = somevalue
someprotectedstatic = somevalue
someprivatestatic = somevalue
external list:
someconst = somevalue
somepublicstatic = somevalue


Actual result:
--------------
static function list:
PHP Notice:  Use of undefined constant self - 
assumed 'self' in /var/www/web/test.php on line 17

Notice: Use of undefined constant self - assumed 'self' 
in /var/www/web/test.php on line 17
PHP Warning:  Invalid argument supplied for foreach() 
in /var/www/web/test.php on line 17

Warning: Invalid argument supplied for foreach() 
in /var/www/web/test.php on line 17
external list:
PHP Notice:  Use of undefined constant someclass - 
assumed 'someclass' in /var/www/web/test.php on line 25

Notice: Use of undefined constant someclass - 
assumed 'someclass' in /var/www/web/test.php on line 25
PHP Warning:  Invalid argument supplied for foreach() 
in /var/www/web/test.php on line 25

Warning: Invalid argument supplied for foreach() 
in /var/www/web/test.php on line 25