Check out example codes for "crawler get text, not get html". It will help you in understanding the concepts better.
Code Example 1
$node->filter('span[class="final-price"]')->each(function ($n) {
$html = $n->html();
$html = explode("<span", $html);
// <span>
// 11 USD
// <span> -37% </span>
// </span>
pr (trim($html[0])); // just get 11 USD only
});
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