code: protected function getPathFromRect(SimpleXMLElement $rect){
  
  		if(empty($rect['width']) || $rect['width'] < 0 || empty($rect['height']) || $rect['height'] < 0){
  			return '';
  		}
  		if(empty($rect['x'])){
  			$rect['x'] = 0;
  		}
  		if(empty($rect['y'])){
  			$rect['y'] = 0;
  		}
  		return 'M'.$rect['x'].' '.$rect['y'].'l'.$rect['width'].' 0l0 '.$rect['height'].'l'.(-$rect['width']).' 0Z';
  
  	}
docs: converts a rect object to a SVG path definition
  
  @param  SimpleXMLElement $rect rect element
  @return string                 SVG path definition