CI框架扩展系统类库

CI框架不支持像yii2框架那样，能够直接在controllers下建立CommonController并继承父类，那么咱们想要作登陆控制或权限控制时，直接在父类控制器操做是不合理的。 这时比较方便的方法就是扩展父类的CI_Controller.

一，建立自定义的父类控制器

在core目录下建立一个自定义类,以MY_为前缀，如MY_Controller,注意这个前缀不能随意填写，受到config.php中配置的约束，并让MY_Controller继承CI_Controller

<?php
 
 
class MY_Controller extends CI_Controller {
 
    /**
     * 后台登陆控制
     * MY_Controller constructor.
     */
    public function __construct()
    {
        parent::__construct();
        $this->load->library('session');
        if (!isset($this->session->user/isLogin)) {
            redirect('login/index');
        }
    }

    public function ajaxReturn($arr) {
		echo json_encode($arr);
		die;
	}
}

二，建立控制器继承自定义父类

<?php
class admin extends My_Controller {

	public function index() {

		$this->load->view("public/title");
		$this->load->view("public/menu");
		$this->load->view("admin");
	}

	public function shopList() {
		$result = $this->db->select('*')->from('shop_list')->get()->result_array();

		$data = [];
		$data['result'] = $result;
		$this->load->view("public/title");
		$this->load->view("public/menu");
		$this->load->view("shopList", $data);
	}

	public function addshop() {
		if ($this->input->post()) {
			$data = [];
			$data['name'] = $this->input->post("name");
			$data['price'] = number_format($this->input->post("price"), 2);
			$data['sb'] = $this->input->post("sb");
			$data['img_url'] = $this->input->post("img_url");
			$data['content'] = htmlspecialchars($this->input->post("content"));
			$data['content2'] = htmlspecialchars($this->input->post("content2"));
			$data['content3'] = htmlspecialchars($this->input->post("content3"));
			$data['create_time'] = date("Y-m-d H:i:s", time());
			$this->db->insert("shop_list", $data);

			$this->ajaxReturn(['status' => 1, 'info' => '上传成功']);
		}


		$this->load->view("public/title");
		$this->load->view("public/menu");
		$this->load->view("shopAdd");
	}
}