title: phpSpreadSheet library giving error when uploaded to the server
body: <p>I am working on a project, in which XLS file needs to be uploaded to the server and extract its content. When I worked on my localhost it was working perfectly, but after I uploaded the project on the server, <code>phpSpreadSheet</code> library started not working. I checked the <code>error_log</code> file in the server and noticed that the following error has appeared. </p>
  
  <pre><code>PHP Parse error: syntax error, unexpected '.', expecting '&amp;' or variable (T_VARIABLE) in 'vendor/markbaker/complex/classes/src/operations/add.php' 
  </code></pre>
  
  <p>I think that I do not have any error in my code as the library was working in my localhost without errors.</p>
  
  <pre><code> $reader = \PhpOffice\PhpSpreadsheet\IOFactory::createReader('Xlsx');
   $reader-&gt;setReadDataOnly(TRUE);
  
   $spreadsheet = $reader-&gt;load(strip_tags($file_path));
  
   $worksheet = $spreadsheet-&gt;getActiveSheet();
  
          $highestRow = $worksheet-&gt;getHighestRow();
          $highestColumn = $worksheet-&gt;getHighestColumn();
  
          $data = $worksheet-&gt;rangeToArray(
              'A1:' . $highestColumn . '1',
              NULL,TRUE,TRUE
          );
  </code></pre>