title: Can't export xlsx or xls in proper format all data are jumbled
body: <p>I use Laravel excel library "maatwebsite/excel"  </p>
  
  <p>Here is my code</p>
  
  <pre><code>\Excel::create('Users Report' . $time, function ($excel) use ($arrUsers) {
  
  
                  $excel-&gt;sheet('Users', function ($sheet) use ($arrUsers) {
  
                      // Set all margins
                      $sheet-&gt;fromArray($arrUsers, null, 'A1', true);
  
                      $sheet-&gt;setSize('A1', 25, 18);
                      $sheet-&gt;setSize('B1', 25, 18);
                      $sheet-&gt;setSize('C1', 25, 18);
  
  
                      $sheet-&gt;row(1, array(
                          'Id', 'Name', 'Username', 'Address', 'Email'
                      ));
  
                      // Freeze first row
                      $sheet-&gt;freezeFirstRow();
                      $sheet-&gt;cell('A1:F1', function ($cell) {
                      });
  
                  });
              })-&gt;store('xlsx')-&gt;download('xlsx');
  </code></pre>
  
  <p>File is downloaded successfully but when I try to open is shown like follows </p>
  
  <p><img src="https://i.stack.imgur.com/KIK0L.png" alt="enter image description here"></p>
  
  <p>I refer following sites and tried according to his solutions but didn't get any solution.
   <a href="https://github.com/Maatwebsite/Laravel-Excel/issues/202" rel="nofollow noreferrer">https://github.com/Maatwebsite/Laravel-Excel/issues/202</a></p>
  
  <p>Please help me out.</p>
  
  <p>Thanks.</p>