How can I find the cell?

[dhlyy]

I want to just take the specific cell like
$rowcount = count($excel -> rows(1));
for( $i=1; $i <= $rowcount; $i+=3){
$cell = 'C'.$i ;

echo $cell;
}

[shuchkin]

out values from 3 column

foreach ($xls->rows() as $r) {
  echo $r[2] . PHP_EOL;
}

and external sources, to help write func getCell( $addr )

see coordinateFromString
https://github.com/PHPOffice/PHPExcel/blob/1.8/Classes/PHPExcel/Cell.php#L584
and
see columnIndexFromString
https://github.com/PHPOffice/PHPExcel/blob/1.8/Classes/PHPExcel/Cell.php#L790