Pass the dynamic variable when button is pressed

I have create this example code:

    // Create connection
    $conn = Connection();

    $result = $conn->query("SELECT * FROM `users` WHERE 1");

  if ($result->num_rows > 0)
  {
    while($row = $result->fetch_assoc())
    {
      $name=  $row["name"] ;
      $id=  $row["id"] ;
      echo "<div class='media text-muted pt-3'>";

      echo "<button class='mr-2 rounded btn-primary icon32 select_c'></button>";

      echo "<p class='media-body pb-3 mb-0 small lh-125 border-bottom border-gray'>";
      echo "<strong class='d-block text-gray-dark'>". $name ."</strong>";
      echo  $id;
      echo "</p>";
      echo "</div>";
    }

I want to pass the id variable when the reference button is pressed using the post method. How can I do?