PHP使用redis实现统计缓存mysql压力的方法

<php
  header("Content-Type:text/html;charset=utf-8");
  include 'lib/mysql.class.php';
  $mysql_obj = mysql::getConn();
  //redis 
  $redis = new Redis();
  $redis->pconnect('127.0.0.1', 6379);
  if(isset($_SERVER['HTTP_REFERER'])){
    $url_md5 = md5($_SERVER['HTTP_REFERER']);
  }
  $adve_key = 'adve'; 
  $adve_key_exists = 'adve_exists';
  if(!$redis->exists($adve_key_exists)){
    $list = $mysql_obj->fetch_array("select * from user_online_adve");
    if($list){
      foreach ($list as $key => $value) {
        $url_hash = md5($value['adve_url']);
        $adve_hash_key = $adve_key.":".$url_hash;
        $id = $value['id'];
        $redis->set($adve_hash_key,$id);
        $redis->set($adve_key_exists,true);
        //$redis->hmset($adve_hash_key, array('id' =>$id));
        //print_r($redis->get($adve_hash_key));
      }
    }
  }
  $adve_new_key = $adve_key.':'.$url_md5;
  if($redis->exists($adve_new_key)){
      $adve_plus = $adve_new_key.":plus" ;
      if(!$redis->exists($adve_plus)){
        $redis->set($adve_plus,1); 
      }else{
        $redis->incr($adve_plus);
        $num = $redis->get($adve_plus);
        if($num >10){
          $id = $redis->get($adve_new_key);
          // insert to sql;
          $mysql_obj->query("update user_online_adve set adve_num=adve_num+$num where id=$id");
          $redis->set($adve_plus,1);
        }
      }
  }
  header('HTTP/1.0 301 Moved Permanently');
  header('Location: https://itunes.apple.com/cn/app/san-guo-zhi15-ba-wangno-da-lu/id694974270mt=8');
/*
  if(){
      $adve_plus = $adve_key.":plus" ;
      if($redis->exists($adve_plus)){
        $redis->incr($adve_plus);
      }else{
        $redis->set($adve_plus,1); 
      }
      echo $redis->get($adve_plus);
  }
  foreach ($list as $key => $value) {
      $url_hash = md5($value['adve_url']);
      $id = $value['id'];
      $adve_num = $value['adve_num'];
      $adve_plus = $adve_key.":plus" ;
      if($redis->exists($adve_plus)){
        $redis->incr($adve_plus);
      }else{
        $redis->set($adve_plus,1); 
      }
      echo $redis->get($adve_plus);
      //if($redis->)
      //$redis->hmset($adve_key, array('id' =>$id, 'adve_num'=>$adve_num));
      //print_r($redis->hmget("adve:$url_hash", array('adve_num')));
  }
    print_r($list);
*/