php getting array key column dynamically

Question

Hi,

I am trying to dynamically get a specific data array by using a function (parsing an excel file, so for instance, I can grab the fourth column of the file as follows):

foreach ($obj->Worksheet->Table->Row as $row)
{
     $rows[] = (string)$row->Cell[4]->Data;
}

My problem is im trying to dynamically specify the "cell" to get and I dont know how to properly format it as I cant use $ within the [] apparently. So Im trying to do this and its not working:

$col = 4;
foreach ($obj->Worksheet->Table->Row as $row)
{
     $rows[] = (string)$row->Cell[$col]->Data;
}

Any help much appreciated. Thanks!

Answer 1

Your expression works, but if you have more complicated expressions use braces.

$rows[] = (string)$row->{Cell[$col]}->Data;