Custom helper in Codeigniter

• Create PHP file in %Project Directory%/application/helpers/  (You can also create helper file in system directory but it’s not the right way.)
• You can give an identical name to that file. E.g. auth_helper.php (You have to add _helper as a suffix.)
• Add following code to that file
• <?php
  defined(‘BASEPATH’) OR exit(‘No direct script access allowed’);
  
  function isLogin() {
  $CI = & get_instance();
  if ($CI->session->userdata(‘admin_id’)) {
  return true;
  }
  return false;
  }
• If you want to access CI library/model in custom helper then you have to access via instance.
  E.g. &get_instance();
• In above example, I created login check function. This will check whether user is logged in or not.

• First, you need to load helper. You can load in multiple ways.
  • Autoload: Please add helper’s name in autoload.php in the config directory of the project.
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  • Manually : You can add helper using $this->load->helper(‘name_of_helper’);
• You can now simply access all the functions of helpers. Just need to write down the name of a function.
  E.g.
  if (isLogin()) {
  echo “Logged in”;
  }else{
  echo “Not Log in”;
  }
• In above exmaple, isLogin() is the name of function from auth helper.
• You can add function anywhere you want to use.

I hope you understand this tutorial. If you have any questions or confusion then please comment it.