title: create calendar with seven following day
body: <p>I want to draw a perpetual calendar on 7 following day</p>
  
  <pre><code>$dt = new DateTime;
  if (isset($_POST['annee']) &amp;&amp; isset($_POST['semaine'])) {
      $dt-&gt;setISODate($_POST['annee'], $_POST['semaine']);
  } else {
      $dt-&gt;setISODate($dt-&gt;format('o'), $dt-&gt;format('W'));
  };
  $annee= $dt-&gt;format('o');
  $semaine= $dt-&gt;format('W');
  
  $KlendrierPerpetuel="";
  $KlendrierPerpetuel.='&lt;table&gt;&lt;tr&gt;';
  do {
      $KlendrierPerpetuel.='&lt;td&gt;'.$dt-&gt;format('D').'&lt;/td&gt;';
      $dt-&gt;modify('+1 day');
  } while ($semaine == $dt-&gt;format('W'));
  $KlendrierPerpetuel.='&lt;/tr&gt;&lt;/table&gt;';
  echo $KlendrierPerpetuel;
  </code></pre>
  
  <p>it creates a table width day of the week instead of 7 next day</p>