<?php 
    $page = "test";
    include 'header.php'; 
?>

<div class="row">
  <div class="col-4">.col-4</div>
  <div class="col-4">.col-4</div>
  <div class="col-4">.col-4</div>
</div>

<div class="row">
  <div class="col-sm-4">.col-sm-4</div>
  <div class="col-sm-4">.col-sm-4</div>
  <div class="col-sm-4">.col-sm-4</div>
</div>

<div class="row">
  <div class="col-md-4">.col-md-4</div>
  <div class="col-md-4">.col-md-4</div>
  <div class="col-md-4">.col-md-4</div>
</div>

<div class="row">
  <div class="col-lg-4">.col-lg-4</div>
  <div class="col-lg-4">.col-lg-4</div>
  <div class="col-lg-4">.col-lg-4</div>
</div>

<div class="row">
  <div class="col-xl-4">.col-xl-4</div>
  <div class="col-xl-4">.col-xl-4</div>
  <div class="col-xl-4">.col-xl-4</div>
</div>

<?php 
    include 'footer.php'; 
?>