Analysis of the core class of CI frame extended system _php Example

In this paper, we illustrate the method of CI framework extending system core class. Share to everyone for your reference, specific as follows:

First of all, your system extension class is placed under the Application/core, the system core class is Ci_controller, so you can not start with ci_, you need to open application/config/config.php modify:

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

The prefix for you!

Some common modules can unload their core classes inside!

These days I read dilicms (lightweight background architecture), such as his background extension class:

<?php if (! defined (' BasePath ')) exit (' No Direct script access allowed '); Abstract class Admin_controller extends Ci_controller {/** * _admin * Save the information for the current logged-on user * @var Object * @access P
  Ublic **/Public $_admin = NULL;
    /** * constructor * @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 '); /** * Check whether the user is logged in * * @access protected * @return void/protected function _check_login () {if (! $th Is->session->userdata (' uid ')) {redirect (' Backend_access_point ').
    '/login '); else {$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 ', "This account has been frozen, please contact admin!")
        ); Redirect (setting (' Backend_access_point ').
      '/login '); }}/** * Load View * * @access protected * @param string * @param array * @return void/protected F
    Unction _template ($template, $data = Array ()) {$data [' tpl '] = $template;
  $this->load->view (' Sys_entry ', $data); /** * Check Permissions * @access protected * @param string * @return void/protected function _check_permit ($acti On = ', $folder = ') {if (! $this->acl->permit ($action, $folder)) {$this->_message (' Sorry, you didn't visit Ask for permission here!
    ', ', FALSE); }/** * Information hint * * @access public * @param String * @param string * @param bool * @param string * @retu RN void */Public Function _message ($msg, $goto = ', $auto = TRUE, $fix = ') {if ($goto = = ') {$go to = Isset ($_server[' http_referer ')? $_server[' Http_referer ']: Site_url ();  
    else {$goto = Strpos ($goto, ' http ')!== false $goto: Backend_url ($goto);
    $goto. = $fix;
    $this->_template (' Sys_message ', Array (' msg ' => $msg, ' goto ' => $goto, ' auto ' => $auto));
    echo $this->output->get_output ();
  Exit ();

 }
}

It put some public information into the verification, landing, jump placed in the admin_controller inside, so I write the front desk is also such operations, extended Font_controller:

Abstract class Font_controller extends ci_controller{public
 function __construct () {
  parent::__construct ();
 }
 //Foreground load View method public
 function _template ($template, $data = Array ()) {
  $data [' nav '] = $this->get_nav ();
  $data [' tpl '] = $template;
  $this->load->view (' Default ', $data);
 }
 Common navigation Information public
 function Get_nav () {
 }
 //Common link Information public
 function Get_friendlink () {
 }
}

Tips, some often used tools and functions can be placed in the helper!

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I hope this article will help you with the PHP program design based on CodeIgniter framework.