empty stream

[cucuru]

hello, I'm using ssh2 extension, the comands execute perfect, but I can't read the response, the returned value of ssh2_exec is always empty:

 

        		if(!($stream = ssh2_exec($con, "ls -al" )) ){
            			echo "fail: unable to execute command\n";
        		} else{
            			// collect returning data from command
            			stream_set_blocking( $stream, true );
			if (!fread($stream,4096)){
				echo "empty";
			} else {
				echo "something";	
			}            			
  			fclose($stream);
        		}

 

where is my problem? I cant find it!

 

Thank you. Regards