php框架CI（codeigniter）自动加载与自主创建对象操

<?php
defined('BASEPATH') OR exit('No direct script aess allowed');
/
  Created by PhpStorm.
  Date: 2018/9/28
  Time: 21:38
 /
class TestNewInstance
{
  protected $CI;
 
  private $age = 0;
 
  public function __construct()
  {
    $this->CI =& get_instance();
  }
 
  public function setAge($age)
  {
    $this->age = $age;
  }
 
  public function getName()
  {
    $count = $this->CI->inner_model->getMaxIdVal();
    return '老王age:'.$this->age.'items_count:'.$count;
  }
 
}

$autoload['libraries']

$this->load->library('TestNewInstance');

// 此2种方法选一即可
// 注意这里面的APPPATH实际上就是Application文件夹，因为结构是固定的
// 所以可以认为引入的时候只要替换面的类名即可
include (APPPATH.'libraries/TestNewInstance.php');
require_once (APPPATH.'libraries/TestNewInstance.php');

  public static function getInstance()
  {
    return new TestNewInstance();
  }

$newInstance1 = TestNewInstance::getInstance();
$newInstance1->setAge(20);
$name1 = $newInstance1->getName();

$newInstance2 = TestNewInstance::getInstance();
$newInstance2->setAge(25);
$name2 = $newInstance2->getName();

$newInstance1 = new TestNewInstance();
$newInstance1->setAge(30);
$name1 = $newInstance1->getName();
$newInstance2 = new TestNewInstance();
$newInstance2->setAge(38);
$name2 = $newInstance2->getName();