php運(yùn)用memcache的完整實(shí)例

$me = new Memcache();
var_dump($me);

$me = new Memcache();
//連接memcache服務(wù)器
$me->connect('127.0.0.1',11211);
//pdo連接數(shù)據(jù)庫
$dsn = "mysql:host=localhost;dbname=www.hm.com";
$username = "hmcom";
$password = "123456";
$pdo = new PDO($dsn,$username,$password);
$pdo->exec('set names utf8');
$pdo->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);


//判斷是否拿到memcache里面的數(shù)據(jù)
//var_dump($me->get('row'));

if(!($row = $me->get('row'))){
 echo '還沒獲取，此時(shí)把數(shù)據(jù)庫的數(shù)據(jù)傳到memcache服務(wù)器里面';
 $sql = "select * from `user` where id > 0";
 $smt = $pdo->prepare($sql);
 $smt->execute();
 $result = $smt->fetchAll();
 $me->set('row',$result,0,50);
 $s = 1;
}else{
 $s = 0;
}

//判斷是否從memcache服務(wù)器獲取到數(shù)據(jù)，
//如果沒有，則訪問數(shù)據(jù)庫里面的數(shù)據(jù)
//如果存在，則直接從memcache里面獲取數(shù)據(jù) （但是注意需要設(shè)置過期時(shí)間，不然永遠(yuǎn)都展示緩存里面的內(nèi)容了）

?>
!doctype html>
html lang="en">
head>
 meta charset="UTF-8">
 meta name="viewport"
   content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
 meta http-equiv="X-UA-Compatible" content="ie=edge">
 title>查看所有用戶/title>
 link rel="stylesheet"  rel="external nofollow" integrity="sha384-9aIt2nRpC12Uk9gS9baDl411NQApFmC26EwAOH8WgZl5MYYxFfc+NcPb1dKGj7Sk" crossorigin="anonymous">
 script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.slim.min.js" integrity="sha384-DfXdz2htPH0lsSSs5nCTpuj/zy4C+OGpamoFVy38MVBnE+IbbVYUew+OrCXaRkfj" crossorigin="anonymous">/script>
 script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous">/script>
 script src="https://cdn.jsdelivr.net/npm/bootstrap@4.5.0/dist/js/bootstrap.min.js" integrity="sha384-OgVRvuATP1z7JjHLkuOU7Xw704+h835Lr+6QL9UvYjZE3Ipu6Tp75j7Bh/kR0JKI" crossorigin="anonymous">/script>
/head>
body>
div class="container">
 h2 class="page-header">查看用戶：/h2>
 a class="btn btn-warning" href="clear.php" rel="external nofollow" rel="external nofollow" >清除緩存/a>
 table class="table table-striped">
  thead class="thead-dark ">
  tr>
   th scope="col">編號(hào)/th>
   th scope="col">用戶名/th>
   th scope="col">年齡/th>
   th scope="col">資產(chǎn)/th>
  /tr>
  /thead>
  tbody>
  ?
  foreach ($row as $k => $rows){
   ?>
   tr>
    th scope="row">?=$rows['id']?>/th>
    td>?=$rows['name']?>/td>
    td>?=$rows['age']?>/td>
    td>?=$rows['money']?>/td>
   /tr>
   ?
  }
  ?>
  /tbody>
 /table>
  ?
  if($s){
   ?>
   div class="alert alert-danger">
    p>頁面數(shù)據(jù)全部來自Mysql數(shù)據(jù)庫!/p>
   /div>
   ?
  }else{
   ?>
   div class="alert alert-success">
    p>頁面數(shù)據(jù)全部來自Memcache緩存!/p>
   /div>
   ?
  }
  ?>
/div>

/body>
/html>

a href="clear.php" rel="external nofollow" rel="external nofollow" class='btn btn-success'>清除緩存/a>

?php
/**
 * Created by PhpStorm.
 * User: lenovo
 * Date: 2020/12/28
 * Time: 14:31
 */

$mem = new Memcache();
//連接memcache
$mem->connect("127.0.0.1",'11211');
//清空緩存
//$mem->flush();
if($mem->flush()){
 echo "script>location='index.php'/script>";
}
?>