How can I export data tab separated - laravel

Question

I'm exporting some Data from a DB and I want to have the 2 columns that I generate Tab separated.
I've already tried to use implode after my fputcsv but it always appears comma separated. Also tried changing my separator (,) to some other character, but a comma is always printed in the CSV.
This is the function that I'm using for it.
public function ResearchExport(Request $request)
{
//Export ProductID and KitID of all the Kits created from the given date to the actual moment
$TubeAddDate = $request->input('TubeAddDate');
$select = DB::table('tubes')->select('TubeBarcodeID', 'ActivationCode')->where('LOG_important', '2')->whereBetween('TubeAddDate', array($TubeAddDate, NOW()))->get();
$tot_record_found=0;
if (count($select)>0) {
$tot_record_found=1;
$CsvData=array('TubeBarcodeID,ActivationCode');
foreach ($select as $value) {
$CsvData[]=$value->TubeBarcodeID.",".$value->ActivationCode.;
}
$filename=date('Y-m-d').".csv"; //stores the file with the date of today as name
$file_path=storage_path().'/'.$filename;
$file = fopen($file_path, "w+");
foreach ($CsvData as $exp_data) {
fputcsv($file, explode(",", $exp_data));
}
fclose($file);
return response()->download($file_path, $filename);
}
return view('InsertForms/download', ['record_found' =>$tot_record_found]);
}
At the moment I'm getting this as output
TubeBarcodeID,ActivationCode
FF01111112,IKG5G-B0FIZ
FF0111113,6XMP8-760Y3
but I expect something tab separated in the CSV like this
TubeBarcodeID ActivationCode
FF01111112 IKG5G-B0FIZ
FF0111113 6XMP8-760Y3

Answer 1

So I actually just solved thanks to one of the commentaries that pointed out my error.
I just had to change my .csv to .xls and then override the third parameter of fputcsv with a "\t".
$filename=date('Y-m-d').".xls"; //stores the file with the date of today as name
$file_path=storage_path().'/'.$filename;
$file = fopen($file_path, "w+");
foreach ($CsvData as $exp_data) {
fputcsv($file, explode(",", $exp_data), "\t");
}