please, help me get function model like codeigniter 3

in codeginiter 3x, i only write one function in model.php, and in view/header.php i write below

PHP Code:

$this->f_homemodel->getPsCate('categories',$vtop_menu->id); 


this function working in codeigniter 3



i test code in codeigniter 4 but it dont working

PHP Code:

in write in basecontroller
use App\Models\HomeModel;

      $HomeModel = new HomeModel();
private function topMenu($input='0'){
        $model=new  HomeModel();
        $data['top_menu'] = $model->getPsCate($input);
      return $data;
        
    }
in view header.php i use $this->topMenu('0');
} 


can someone to show me how to use in codeigniter 4 ?

thank in a advance

It seems you need to know PHP OOP and what $this means.

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