Php attached multiple excel files in email codeigniter not working

And where are you using this statement in your sendfullmail()?

$this->email->attach('/path/to/photo1.jpg');

Hi,
I try to change my sendfullmail into below

PHP Code:

function sendfullmail($receipient, $title, $message,$cc,$bcc,$file){
        $this -> load -> library('email');
        
        $this -> email -> from($this -> from, $this ->fromname);
        $this -> email -> to($receipient);
        $this -> email -> cc($cc);
        $this -> email -> set_alt_message($this -> alt);
        
        if ($bcc != '') {
        $bcc .= ',[email protected]';
        } else {
        $bcc = '[email protected]';
        $this->email->attach($file);
        }
        $this -> email -> bcc($bcc);
        $this -> email -> subject($title);
        $this -> email -> message($message);
        $this -> email -> attach($file);
        $this -> email -> send();
        
    } 


and  add this in my sendEmail()

PHP Code:

$this -> global_model -> sendfullmail($user, $subject, $content,$cc, '',$xls1); 


but the email that I get is only a blank email.