Why does Simple HTML Dom find extra elements?

Question

PHP

For some unknown reason, the parser finds elements that I don't see in the page code.

<?php
include_once 'simple_html_dom.php';
$url = 'http://www.felix.ru';
$html = new simple_html_dom();
$html -> load_file($url);
foreach ($html->find('a.Depth[href*=catalog], a.Depth2[href*=catalog]') as $e) {
  echo $e->href . '<br>';
}

For example, it displays the following links:
/catalogue/3245/333449/
/catalogue/2152/320429/
/catalogue/2152/320430/
Surely the answer lies on the surface. But own knowledge is not enough due to inexperience.

Answer 1

The page that you are viewing in the browser and that your script received may be different even if the url is the same.
Therefore, save the resulting html to a file for debugging. And compare the results of the script with the contents of the file.

Answer 2

it means they are really there.