CodeIgniter中间件：为应用程序提供自动化缓存处理

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class CacheMiddleware implements Middleware {
    private $CI;

    public function __construct() {
        $this->CI =& get_instance();
        $this->CI->load->driver('cache');
    }

    public function handle(Request $request, Closure $next) {
        $cacheKey = md5($request->getUri()->getBaseUrl() . $request->getUri()->getPath());
        if ($this->CI->cache->get($cacheKey)) {
            return $this->CI->cache->get($cacheKey);
        } else {
            $response = $next($request);
            $this->CI->cache->save($cacheKey, $response, 3600); // 缓存1小时
            return $response;
        }
    }
}
?>

$autoload['libraries'] = array('cache');

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class ExampleController extends CI_Controller {
    public function __construct() {
        parent::__construct();
        $this->middleware(['CacheMiddleware']);
    }

    public function index() {
        $this->output->set_output('Hello, World!');
    }
}
?>