Get HREF Atribute of anchor tag by class name in PHP

I was looking for extracting href value from html link(a) tags in PHP. Came up with the following solution. It’s useful to extract links from a website

function get_href_attribute("Google","a","my_tag")

function get_href_attribute($html,$tag,$class)

   // Load the HTML in DOM
   $doc = new DOMDocument();

   // Then select all anchor tags
   $all_anchor_tags = $doc->getElementsByTagName($tag);
   $href_array = array();
   foreach ($all_anchor_tags as $_tag) {
      if ($_tag->getAttribute("class") == $class) {
         // If match class get the href value
         $href_array[] = $link->getAttribute("href");
  return $href_array;

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