New Post: How To Get the sheet names?

Massi wrote:

you can also use
$objReader->listWorksheetNames($file);
to get an array of all sheet names in the file

That's it! I find it easier using this.
Now My codes are:

$sheets = $read->listWorksheetNames($filepath);
foreach($sheets as $sheetname){
    switch ($sheetname)
            {
                case 'A':
                    $_sheet = $excel->setActiveSheetIndexByName($sheet);
                    $this->do_A($_sheet);
                        break;
                case 'B':
                    $_sheet = $excel->setActiveSheetIndexByName($sheet);
                    $this->do_B($_sheet);
                break;
                case 'C':
                    $_sheet = $excel->setActiveSheetIndexByName($sheet);
                    $this->do_C($_sheet);
                break;
                                default:
                        $this->do_D();
                break;
}

Thank you again for giving me a hint how to do it quickly and better.

@LWol
Thank you for the responses,
After an hour of writing codes finally the codes are done...

Thank you all