// In insert function in controller paste this code after addedd successfully in database ...

$response=$this->Master_model->save_doctor_details_data();
			if($response>0)
			{

				$this->session->set_flashdata('Success', 'Doctor Added Successfully...');



echo $email=$this->input->post('email_address');
			echo $username=$this->input->post('mobile_number');
			echo $password=$this->input->post('mobile_number');

			 $from="admin";
			$name="Hospitalo";
			$to= $email;
			$subject ="Hospitalo Username and Password ";
			$message = "Your Doctor Registration is Successfull, and Your Username is : ".$username." and Password is : ".$password;

			echo "mailresult=".$mailresult =$this->sendMail($from,$name,$to,$subject,$message);


      }

// call send mail function outside the function
      as code ...

      public function sendMail($from,$name,$to,$subject,$message)
		{
			$this->email->from($from, $name);
			$this->email->to($to);
			$this->email->cc($cc);
			$this->email->set_mailtype('html');
			$this->email->subject($subject);
			$this->email->message($message);
			$this->email->send();
		}