<?php 

  echo"hello world";

  ?>

​

​

<div class="container-fluid">

    <div class="row">

      <div class="col-md-6">

        <div class="card">

          <div class="card-header code-header" data-bs-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample">

            <h5>Select by class</h5>

            <i class="ti ti-code source" data-source="dlb1"&l></i>

          </div>

          <div class="card-body">

            <select class="select1" multiple>

              <option value="1">One</option>

              <option value="2">Two</option>

              <option value="3">Three</option>

            </select>

          </div>

        </div>

      </div>

    </div>

  </div>