Analysis of methods of CI framework extending system core classes, ci framework_PHP tutorial

Analysis of the method of extending the core classes of the system by the CI framework, ci framework

The example in this article describes the method of extending the core classes of the system by the CI framework. Share it with everyone for your reference, the details are as follows:

First of all, your system extension class is placed under application/core. The original system core class is CI_Controller, so you can’t start with CI_. You need to open application/config/config.php and modify:

$config['subclass_prefix'] = 'MY_';

is your prefix!

Some public modules can be uninstalled in their own core classes!

I have read Dilicms (lightweight background architecture) these days. For example, his background extension class is like this:

<&#63;php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
abstract class Admin_Controller extends CI_Controller
{
  /**
  * _admin
  * 保存当前登录用户的信息
  *
  * @var object
  * @access public
  **/
  public $_admin = NULL;
  /**
  * 构造函数
  *
  * @access public
  * @return void
  */
  public function __construct()
  {
    parent::__construct();
    $this->load->library('session');
    $this->settings->load('backend');
    $this->load->switch_theme(setting('backend_theme'));
    $this->_check_login();
    $this->load->library('acl');
    $this->load->library('plugin_manager');
  }
 /**
  * 检查用户是否登录
  *
  * @access protected
  * @return void
  */
  protected function _check_login()
  {
    if ( ! $this->session->userdata('uid'))
    { 
      redirect(setting('backend_access_point') . '/login');
    }
    else
    {
      $this->_admin = $this->user_mdl->get_full_user_by_username($this->session->userdata('uid'), 'uid');
      if ($this->_admin->status != 1)
      {
        $this->session->set_flashdata('error', "此帐号已被冻结,请联系管理员!");
        redirect(setting('backend_access_point') . '/login');
      }
    }
  }
 /**
  * 加载视图
  *
  * @access protected
  * @param string
  * @param array
  * @return void
  */
  protected function _template($template, $data = array())
  {
    $data['tpl'] = $template;
    $this->load->view('sys_entry', $data);
  }
 /**
  * 检查权限
  *
  * @access protected
  * @param string
  * @return void
  */
  protected function _check_permit($action = '', $folder = '')
  {
    if ( ! $this->acl->permit($action, $folder))
    {
      $this->_message('对不起，你没有访问这里的权限！', '', FALSE);
    }
  }
 /**
  * 信息提示
  *
  * @access public
  * @param string
  * @param string
  * @param bool
  * @param string
  * @return void
  */
  public function _message($msg, $goto = '', $auto = TRUE, $fix = '')
  {
    if($goto == '')
    {
      $goto = isset($_SERVER['HTTP_REFERER']) &#63; $_SERVER['HTTP_REFERER'] : site_url();
    }
    else
    {
      $goto = strpos($goto, 'http') !== false &#63; $goto : backend_url($goto);  
    }
    $goto .= $fix;
    $this->_template('sys_message', array('msg' => $msg, 'goto' => $goto, 'auto' => $auto));
    echo $this->output->get_output();
    exit();
  }
}

It puts some public information into the Admin_Controller for verification, login, and jump, so I did the same when writing the front desk and extended the Font_Controller:

abstract class Font_Controller extends CI_Controller{
 public function __construct() {
  parent::__construct();
 }
 //前台加载视图方法
 public function _template($template, $data = array()){
  $data['nav'] = $this->get_nav();
  $data['tpl'] = $template;
  $this->load->view('default',$data);
 }
 //公共导航信息
 public function get_nav(){
 }
 //公共友情链接信息
 public function get_friendlink(){
 }
}

Tip, some frequently used tools and functions can be placed in the helper!

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I hope this article will be helpful to everyone’s PHP program design based on the CodeIgniter framework.

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