PHP实现负载均衡session共享redis缓存操作示例

<meta chatset='utf-8'>
<center>
<form action="se.php" method="post">
 <table>
  <tr>
   <td>帐号：</td>
   <td><input type="text" name="username"></td>
  </tr>
  <tr>
   <td>密码：</td>
   <td><input type="password" name="pwd"></td>
  </tr>
  <tr>
   <td></td>
   <td><input type="submit" value="登录"></td>
  </tr>
 </table>
</form>
</center>

<?php
 header('content-type:text/html;charset=utf-8');
 set_time_limit(10);
 ini_set("session.save_handler",'redis');//开启php.ini中的redis配置
 ini_set("session.save_path","tcp://192.168.1.70:6379");//第一台服务器的redis
 session_start();//开启session
 $username = $_POST['username'];
 $_SESSION['username'] = $username;
 echo "<script>alert('登录成功！');location.href='from.php'</script>";//登录成功后跳转到欢迎登录页面
?>

<?php
 header('content-type:text/html;charset=utf-8');
 set_time_limit(10);
 ini_set("session.save_handler",'redis');//开启php.ini中的redis配置
 ini_set("session.save_path","tcp://192.168.1.70:6379");//第一台服务器的redis
 session_start();//开启session
 $username = isset($_SESSION['username']) ? $_SESSION['username'] : '';//判断当前是否存在session
 //$id = $_SESSION['PHPSESSID'];
 //echo $id;
 if(empty($username)){
  echo "<script>alert('请重新登录！');location.href='index.php'</script>";
 }else{
  echo "欢迎".$username."登录";
 }
?>