$target_file

        //  echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.".shell_exec("matlab -nodesktop -nosplash -r  \"main_xls_input($target_file,40, 0.4, 0.01, 0.1, 3); exit\"");
      echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.".shell_exec("matlab -nodesktop -nosplash -r  \"main_xls_input('".$target_file."',40, 0.4, 0.01, 0.1, 3); exit\"");