How to call helper function in Codeigniter view

• Create a helper file in codeigniter 4

  --PATH app\Helpers\custom_helper.php

  <?php 
  
  if(!function_exists('changedateFormat')){
      function changedateFormat($format = 'd-m-Y', $originalDate){
          return date($format, strtotime($originalDate)); 
      }
  }
  

• Loading helper in codeigniter 4

  Loading helper using BaseController

  app\Controllers\BaseController.php

  class BaseController extends Controller
  {
  	/**
  	 * An array of helpers to be loaded automatically upon
  	 * class instantiation. These helpers will be available
  	 * to all other controllers that extend BaseController.
  	 *
  	 * @var array
  	 */
  	protected $helpers = ['custom'];
  

  ANOTHER METHOD

  Loading helper using controller's method

  You can also load the helper in the controller's method in Codeigniter 4.

  app\Controllers\<Home>.php

  public function index(){
      
      helper("custom");
  

  There are two different methods used to load a helper in Codeigniter 4. The first is used to load the helper globally using BaseController.php and the second method is used to load the helper in the controller's method.

  The helpers property with helper name (custom in our case) will be available to all other controllers that extend BaseController.

• Call helper method in view in Codeigniter 4

  --PATH app\Views\home.php

  <?= changedateFormat('Y-m-d', '11/05/2021');  ?>
  

  You can simply call the helper file’s methods by the function name and passing the value to it.

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