Notice (8): Undefined offset: 0 [APPViewFrontusersadmin_exportemails.ctp, line 12]

Warning (2): fputcsv() expects parameter 2 to be array, null given [APPViewHelperCsvHelper.php, line 36]

Notice (8): Undefined offset: 1 [APPViewFrontusersadmin_exportemails.ctp, line 12]

Warning (2): fputcsv() expects parameter 2 to be array, null given [APPViewHelperCsvHelper.php, line 36]

$line= $useremails[0]['Frontuser'];
$this->CSV->addRow(array_keys($line));

foreach ($useremails as $key => $useremail)
{
      $line =$useremail[$key]['Frontuser'];
       $this->CSV->addRow($line);
}
$filename='useremails';
echo  $this->CSV->render($filename);

Array
    (
        [0] => Array
            (
                [Frontuser] => Array
                    (
                        [name] => Rash
                        [email] => rash.com
                    )

            )

        [1] => Array
            (
                [Frontuser] => Array
                    (
                        [name] => John
                        [email] => john@gmail.com
                    )

            )

    )