Ajouter une nouvelle ligne pour exceller le fichier à l'aide de la bibliothèque PHPEXCEL

 <?php 
  require_once 'PHPExcel.php';
  require_once 'PHPExcel/IOFactory.php';
  //Update the multiple sheets in PHP excel
 $report_file = 'Report_' . date('Y-m-d') . '.xlsx';
 $report_file_exists  = 0;
 //If the file doesnot exist , create new otherwise append the data at last
 if (!file_exists($report_file)) {
      $objPHPExcel = new PHPExcel();
 } else {
      $report_file_exists = 1;
      $objPHPExcel = PHPExcel_IOFactory::load($report_file);
 }

 $columns = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z');

 //Sheet details
 $sheet_details = array(
                        //1st sheet details
                        0 => array('sheet_title' => 'Products', 
                                   'sheet_heading' => array('Article_Number','Name'),
                                   'sheet_data' => array('1234','Pen')
                                   ),
                        //2nd Sheet Details
                        1 => array('sheet_title' => 'Categories',
                                   'sheet_heading' => array('Category Id','Name'),
                                   'sheet_data' => array(123,'Accessories')
                                  )
                   );

 $sheet_count = 0;
 $row = 1;
 $column = 0;
 while ($sheet_count <= count($sheet_details)) {
      $objWorkSheet = '';
      if ($report_file_exists == 0) {
           if ($sheet_count > 0) {
                $objWorkSheet = $objPHPExcel->createSheet($sheet_count);
           } else {
                $objWorkSheet = $objPHPExcel->getActiveSheet();
           }
           $row = 1;
           $column = 0;
           foreach ($sheet_details[$sheet_count]['sheet_heading'] as $head) {
                $objWorkSheet->setCellValue($columns[$column] . $row, $head);
                $column++;
           }
      } else {
           $objPHPExcel->setActiveSheetIndex($sheet_count);
           $objWorkSheet = $objPHPExcel->getActiveSheet($sheet_count);
      }

      $row = $objWorkSheet->getHighestRow() + 1; //row count
      foreach ($sheet_details[$sheet_count]['sheet_data'] as $report_details) {
           $column = 0;
           foreach ($report_details as $data) {
                $objWorkSheet->setCellValue($columns[$column] . $row, $data);
                $column++;
           }
           $row++;
      }

      $objWorkSheet->setTitle($sheet_details[$sheet_count]['sheet_title']);
      $sheet_count++;
 }

 $objWriter = new PHPExcel_Writer_Excel2007($objPHPExcel);

 $objWriter->save($report_file);
 ?>