我在CodeIgniter中发送带有附件的邮件时遇到了一点麻烦。下面是我的代码：

$to="mailtouser@gmail.com"
        $fileUrl=array(base_url()."assets/pdf/sample.pdf", base_url()."assets/pdf/sample1.pdf");
        $subject="TEST MAIL";
        $message="TEST MESSAGE";
        $this->load->library('email');
        $from = "admin@gmail.com;
        $config['wordwrap'] = TRUE;
        $config['mailtype']='html';
        $config['charset'] = 'utf-8';
        $config['priority'] = '2';
        $config['protocol'] = 'sendmail';
        $config['mailpath'] = '/usr/sbin/sendmail';
        $this->email->initialize($config);
        $this->email->set_newline("\r\n");
        $this->email->from($from, 'Little Bloom');
        //$this->email->to();
        if($cc!=''){
            $this->email->cc('sendmail@gmail.com');    
        }
        $this->email->bcc($to);

        $this->email->subject($subject);
        $this->email->message($message);
        if(!empty($fileUrl))
        {
            foreach($fileUrl as $key)
            {  
                $this->email->attach($key);
            }
        }
        return $this->email->send();

有多个pdf文件，所以我正在使用一个数组来保存网址，但当我把这个发送到我的电子邮件功能，这些文件没有附加到邮件。