title: Remove empty columns in an excel file using phpexcel library
body: <p>I am using phpexcel library to read an excel file.It works perfeclty on 99%. But sometimes it reads empty columns also.My code is</p>
  
  <pre><code>try {
      $inputFileType = PHPExcel_IOFactory::identify($inputFileName);
      $objReader = PHPExcel_IOFactory::createReader($inputFileType);
      $objPHPExcel = $objReader-&gt;load($inputFileName);
  } catch(Exception $e) {
      die('Error loading file');
  }   
  
  $worksheet=$objPHPExcel-&gt;getActiveSheet();) {
  $worksheetTitle     = $worksheet-&gt;getTitle();
  $highestRow         = $worksheet-&gt;getHighestRow();
  $highestColumn      = $worksheet-&gt;getHighestColumn();
  $highestColumnIndex = PHPExcel_Cell::columnIndexFromString($highestColumn);
  $nrColumns = ord($highestColumn) - 64;
  </code></pre>
  
  <p>sometimes the $highestcolumn returns 'WVL' even if the data in excel column up to 'C' why?.
  Also i want to check all the rows under a particular column is empty or not,Is there any easy method to do it instead of iterating  all rows using for loop.</p>