class ModelXe{

protected $table = 'xxxxxx';
public  function __construct()
{
    $listCol = DB::table('INFORMATION_SCHEMA.COLUMNS')
        ->select('COLUMN_NAME')
        ->where('TABLE_SCHEMA','=',env('DB_DATABASE'))
        ->where('TABLE_NAME','=',$this->table)->get();
    foreach($listCol as $colName){
        $c = $colName->COLUMN_NAME;
        $this->$c = null;

    }
}
}