CI框架附属类用法分析

$this->load->helper('url');
$this->load->library('session');
$this->config->item('base_url');

$CI =& get_instance();

$CI =& get_instance();
$CI->load->helper('url');
$CI->load->library('session');
$CI->config->item('base_url');

class Example {
  protected $CI;
  // We'll use a constructor, as you can't directly call a function
  // from a property definition.
  public function __construct()
  {
    // Assign the CodeIgniter super-object
    $this->CI =& get_instance();
  }
  public function foo()
  {
    $this->CI->load->helper('url');
    redirect();
  }
  public function bar()
  {
    $this->CI->config->item('base_url');
  }
}