Laravel, Dom, how to get all h2 tags instead of one?

I've created an xml file with all the results of my SEO scan. Now i'm trying to output everything on a details page per scan.

How do i get all h2 tags to save into my database? PHP_EOL doesn't work. This is my code. Normally i would use PHP_EOL after the nodeValue but that doesn't work in my controller.

Im using Laravel 5.4.

foreach ($htag2 as $node) {
  $ts->h2_tag = $node->nodeValue;
}

via itvba