Description:
------------
parse error in function's default value.
thanks.

Reproduce code:
---------------
class LinkManager
{
	var $uri, $flag;

	function LinkManager($uri = $_SERVER['REQUEST_URI']) // this line bug. $uri = '' is ok. $uri = $_ is error. why not?
	{
		$this->uri = $uri;
		if(strpos($uri, '?'))
			$this->flag = '&';
		else
			$this->flag = '?';
		return TRUE;
	}
}

Actual result:
--------------
active code.

class LinkManager
{
	var $uri, $flag;

	function LinkManager($uri = '')
	{
		if($uri == '')
			$this->uri = $_SERVER['REQUEST_URI'];
		else
			$this->uri = $uri;
		if(strpos($uri, '?'))
			$this->flag = '&';
		else
			$this->flag = '?';
		return TRUE;
	}
}