code: function toString($attributes = true, $recursive = true, $content_only = false) {
  		if ($content_only) {
  			if (is_int($content_only)) {
  				--$content_only;
  			}
  			return $this->toString_content($attributes, $recursive, $content_only);
  		}
  
  		$s = '<'.$this->tag;
  		if ($attributes) {
  			$s .= $this->toString_attributes();
  		}
  		if ($this->self_close) {
  			$s .= $this->self_close_str.'>';
  		} else {
  			$s .= '>';
  			if($recursive) {
  				$s .= $this->toString_content($attributes);
  			}
  			$s .= '</'.$this->tag.'>';
  		}
  		return $s;
  	}
docs: Returns the node as string
  @param bool $attributes Print attributes (of child tags)
  @param bool|int $recursive How many sub-levels of child tags to print. True for all.
  @param bool|int $content_only Only print text, false will print tags too.
  @return string