Codeigniter Migrate

//step-1 create Mirgrate controller in application/controller folder 

<?php  if ( ! defined('BASEPATH')) exit("No direct script access allowed");

class Migrate extends CI_Controller {

  public function __construct()
  {
    parent::__construct();

    $this->input->is_cli_request() 
      or exit("Execute via command line: php index.php migrate");

    $this->load->library('migration');
  }

  public function index()
  {
    if(!$this->migration->latest()) 
    {
      show_error($this->migration->error_string());
      
    } else { 
      echo 'Migration(s) done'.PHP_EOL;
    }
  }
}

//step-2: Then to execute latest migration, cd into the root of the project directory and run:

php index.php migrate