Import Excel using MaatWerbsite

Question

I am trying to import excel file in Laravel using Maatwebsite version 3.1. If my excel has all columns filled I have no problem but if some cells are missing it stops working and gives an error

"Error Exception (E_NOTICE) Undefined offset: 1"

 public function model(array $row)
    {

     if(sizeof($row[0]) >0 and sizeof($row[1]) >0 and sizeof($row[2]) >0 and sizeof($row[3]) >0 and sizeof($row[4]) >0 and sizeof($row[5] > 0 ){ 

        return new TempLeads([
            'description'  => $row[0],
            'name' => $row[1],
            'email'    => $row[2],
            'mobile'    => $row[3],
            'city'    => $row[4],
            'company_name'    => $row[5],
            'project'    => 'Bahria',
            'date'    => date('Y-m-d'),
        ]);
    }
  }

Above code works if all columns and cells fill in excel file. Data is inserted in table

I want to import data with some missing cells but not the entire Row and also want to skip empty row.