PHPExcel Column Loop

Question

How can I do a loop which based on Excel worksheet columns? I found (and used) WorksheetIterator, RowIterator and CellIterator but nothing about columns.

Answer 1

This recursive method was designed allows you to get the "letters" of the columns, whatever the number of columns you have, from "A" to "ZZZZZZZZZ..." :

function getColumnLetter( $number )
{
    $prefix = '';
    $suffix = '';
    $prefNum = intval( $number/26 );
    if( $prefNum > 25 )
    {
        $prefix = getColumnLetter( $prefNum );
    }
    $suffix = chr( fmod( $number, 26 )+65 );
    return $prefix.$suffix;
}

So you can loop the columns of an PHP array on index number and convert it to a string of letters and use it in PHPExcel methods, like "setCellValue" ... But solutions above are surely faster if you can use them !