|
protected _extractFormat ( |
||
| $Link | Link tag. | |
| return | string|null Format. | |
protected function _extractFormat(Tag $Link)
{
$isAlternate = $Link->matches('rel', '~alternate~i');
$hasFormat = $Link->matches('type', '~(?<format>json|xml)~i', $matches);
return $isAlternate && $hasFormat ? $matches['format'] : null;
}