I'm not sure, but are you trying to put together the line again? As in:
$data[] = "a";
$data[] = "comma";
$data[] = "delimited";
$data[] = "file";
That's what you get from fgetcsv, right? Are you trying to get
"a comma delimited file"
? Is that what you mean by "take the array into a single line/string"?
If yes, then look at the function implode() in php.net
Diego