fromPort = $fromPort; } /** * @param null $toPort */ public function setToPort($toPort): void { $this->toPort = $toPort; } /** * Returns the edge definition as is requested by GraphViz. * * @return string */ public function __toString() { $attributes = array(); foreach ($this->attributes as $value) { $attributes[] = (string)$value; } $attributes = implode("\n", $attributes); $from_name = addslashes($this->getFrom()->getName()); $to_name = addslashes($this->getTo()->getName()); $from_name .= (!empty($this->fromPort)) ? ':' . $this->fromPort : ''; $to_name .= (!empty($this->toPort)) ? ':' . $this->toPort : ''; return << $to_name [ $attributes ] DOT; } }