<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Welcome extends CI_Controller {
  public function index()
  {
    $this->load->library('email'); //加載CI的email類
    //以下設置Email參數(shù)
    $config['protocol'] = 'smtp';
    $config['smtp_host'] = 'smtp.163.com';
    $config['smtp_user'] = 'fanteathy';
    $config['smtp_pass'] = '******';
    $config['smtp_port'] = '25';
    $config['charset'] = 'utf-8';
    $config['wordwrap'] = TRUE;
    $config['mailtype'] = 'html';
    $this->email->initialize($config);
    //以下設置Email內容
    $this->email->from('fanteathy@163.com', 'fanteathy');
    $this->email->to('517081935@qq.com');
    $this->email->subject('Email Test');
    $this->email->message('<font color=red>Testing the email class.</font>');
    $this->email->attach('application\controllers\1.jpeg'); //相對于index.php的路徑
    $this->email->send();
    //echo $this->email->print_debugger(); //返回包含郵件內容的字符串，包括EMAIL頭和EMAIL正文。用于調試。
  }
}

$this->email->initialize($config)

$this->email->send()