如何从html到php laravel5获取id值

1.How is it possible to get the value of id from inside h4 tag html. This id has a value of an integer as counter coming from my jquery

  1. I need to pass the count to my php code to be like $c = chr(64 + value of id image-gallery-count) I'm having trouble with this for almost a week now. Hope anyone code help me here. See my code below.$('#image-gallery-count').text($sel.data('count'));

              <h4 id="image-gallery-count"></h4>
    
    <?php $html = '<h4 id="image-gallery-count"></h4>';
              $doc = new DOMDocument();
              $doc->validateOnParse = true;
              $doc->loadHTML($html);
              $doc->preserveWhiteSpace = false;
              $belement = $doc->getElementById('image-gallery-count');
              echo $belement->nodeValue;
              $xpath = new DOMXPath($doc);
              $xpath->query("//*[@id='image-gallery-count']");
    
              $c = chr(64 + value of id here);// I want to add the value id of <h4 id="image-gallery-count"></h4>
              $b = chr(64 + 1);
    
    ?>