Description:
------------
using the ssh2_sftp() function to create an resource to access an sftp server causes an resource error when using the functions in OOP context and storing the resource handle returned by ssh2_sftp() into an LOCAL var. using class global vars, everything works as expected

it seems that the resource reference created by ssh2_sftp() getting closed by the garbage collection when leaving the constructor. it might be an core error into the php garbage collector - it should update references which are used by other variables

::installed SSH2 Extension
pecl::ssh2 0.11.3 (beta)

::configure options
./configure --with-freetype-dir=/usr/lib --enable-gd-native-ttf --enable-exif --enable-zip  --with-bz2 --with-zlib --enable-ftp --with-gd --with-jpeg-dir=/usr/lib --with-png-dir=/usr/lib --with-mysql=/usr/lib --with-mhash --with-pdo-mysql --with-sqlite --with-openssl --enable-mbstring --enable-debug=no --with-config-file-path=/etc/php --enable-calendar

::php ini changes
:::added
extension=ssh2.so

Test script:
---------------
// this code causes the failure
class failure{
	public $this->resourceIdentifier;
	
	public function __construct(){
		...
		// get sftp con
		$sftpcon = ssh2_sftp($connection);
			
		// set resource handle
		$this->resourceIdentifier = "ssh2.sftp://$sftpcon";
	}
	
	public function open(){
		// causes an error: Warning: opendir(): 8 is not a valid SSH2 SFTP resource
		$handle = opendir($this->resourceIdentifier);
		...
	}
}

// this is a workaround by using a class variable
class workaround{
	public $this->resourceIdentifier;

	public function __construct(){
		...
		// get sftp con -> class global var
		$this->_sftpcon = ssh2_sftp($connection);
		
		// set resource handle
		$this->resourceIdentifier = "ssh2.sftp://$this->_sftpcon";
	}

	public function open(){
		// works fine..
		$handle = opendir($this->resourceIdentifier);
		...
	}
}

Expected result:
----------------
$handle should be an valid directory handle!

Actual result:
--------------
Warning: opendir(): 8 is not a valid SSH2 SFTP resource