php+redis实现注册、删除、编辑、分页、登录、关注等功能的方法

<?php
  //实例化
  $redis = new Redis();
  //连接服务器
  $a=$redis->connect("localhost",6379);
  //var_dump($a);
  //授权
  $redis->auth("107lab");

<form action="reg.php" method="post">
  用户名:<input type="text" name="username"><br>
  密码:<input type="password" name="password"><br>
  年龄:<input type="text" name="age"><br>
  <input type="submit" value="注册">
  <input type="reset" value="重填">
</form>

<?php
  require("redis.php");
  $username = $_POST[&#39;username&#39;];
  $password = md5($_POST[&#39;password&#39;]);
  $age = $_POST[&#39;age&#39;];
  //echo $username.$password.$age;
  $uid = $redis->incr("userid");//设置自增id，相当于主键
  $redis->hMset("user:".$uid,array("uid"=>$uid,"username"=>$username,"password"=>$password,"age"=>$age));//用hash类型存储用户比较方便
  //将用户id存入一个链表中，便于统计数据
  $redis->rpush("uid",$uid);
  //将用id存入以用户名为键的字符类型中，便于查看用户是否存在。
  $redis->set("username:".$username,$uid);
  header(&#39;location:list.php&#39;);

<a href="add.php" rel="external nofollow" >注册</a>
<?php
  require("redis.php");
  if(!empty($_COOKIE[&#39;auth&#39;])){
    $id = $redis->get("auth:".$_COOKIE[&#39;auth&#39;]);
    $name = $redis->hget("user:".$id,"username");
?>
    欢迎您：<?php echo $name;?> <a href="logout.php" rel="external nofollow" >退出</a>
  <?php } else { ?>
  <a href="login.php" rel="external nofollow" >登录</a>
  <?php } ?>
<?php
  require("redis.php");
  //用户总数
  $count = $redis->lsize("uid");//获取链表的长度
  //echo $count;
  //页大小
  $page_size = 3;
  //当前页码
  $page_num=(!empty($_GET[&#39;page&#39;]))?$_GET[&#39;page&#39;]:1;
  //页总数
  $page_count = ceil($count/$page_size);
  $ids = $redis->lrange("uid",($page_num-1)*$page_size,(($page_num-1)*$page_size+$page_size-1));
  //var_dump($ids);
  foreach($ids as $v){
    $data[]=$redis->hgetall("user:".$v);
  }
  /*
  //以下为最初想到的分页处理，放入一个数组中，根据uid的最大值来当总个数，但是删除个别用户以后，uid不会变小，所以建议用链表，因为他有个lsize函数可以求出链表长度
  //根据userid获取所有用户
  for($i=1;$i<=($redis->get("userid"));$i++){
    $data[]=$redis->hgetall("user:".$i);
  }
  //过滤空值
  $data = array_filter($data);
  //var_dump($data);
  */
?>
<table border=1>
  <tr>
    <th>uid</th>
    <th>username</th>
    <th>age</th>
    <th>操作</th>
  </tr>
  <?php foreach($data as $v){ ?>
  <tr>
    <td><?php echo $v[&#39;uid&#39;]?></td>
    <td><?php echo $v[&#39;username&#39;]?></td>
    <td><?php echo $v[&#39;age&#39;]?></td>
    <td>
      <a href="del.php?id=<?php echo $v[&#39;uid&#39;];?>" rel="external nofollow" >删除</a>
      <a href="mod.php?id=<?php echo $v[&#39;uid&#39;];?>" rel="external nofollow" >编辑</a>
      <?php if(!empty($_COOKIE[&#39;auth&#39;]) && $id != $v[&#39;uid&#39;]){ ?>
      <a href="addfans.php?id=<?php echo $v[&#39;uid&#39;];?>&uid=<?php echo $id;?>" rel="external nofollow" >加关注</a>
      <?php } ?>
    </td>
  </tr>
  <?php } ?>
  <tr>
    <td colspan="4">
      <?php if(($page_num-1)>=1){ ?>
      <a href="?page=<?php echo ($page_num-1);?>" rel="external nofollow" >上一页</a>
      <?php } ?>
      <?php if(($page_num+1)<=$page_count){ ?>
      <a href="?page=<?php echo ($page_num+1);?>" rel="external nofollow" >下一页</a>
      <?php } ?>
      <a href="?page=1" rel="external nofollow" >首页</a>
      <a href="?page=<?php echo ($page_count);?>" rel="external nofollow" >尾页</a>
      当前<?php echo $page_num;?>页
      总共<?php echo $page_count;?>页
      总共<?php echo $count;?>个用户
    </td>
  </tr>
</table>
<!--关注功能，建议用集合实现，因为集合元素唯一，并且可以容易求出两个用户粉丝之间交集与差集，进而进行好友推荐功能-->
<table border=1>
  <caption>我关注了谁</caption>
  <?php
    $data = $redis->smembers("user:".$id.":following");
    foreach($data as $v){
      $row = $redis->hgetall("user:".$v);
  ?>
  <tr>
    <td><?php echo $row[&#39;uid&#39;];?></td>
    <td><?php echo $row[&#39;username&#39;];?></td>
    <td><?php echo $row[&#39;age&#39;];?></td>
  </tr>
  <?php } ?>
<table>
<table border=1>
  <caption>我的粉丝</caption>
  <?php
    $data = $redis->smembers("user:".$id.":followers");
    foreach($data as $v){
      $row = $redis->hgetall("user:".$v);
  ?>
  <tr>
    <td><?php echo $row[&#39;uid&#39;];?></td>
    <td><?php echo $row[&#39;username&#39;];?></td>
    <td><?php echo $row[&#39;age&#39;];?></td>
  </tr>
  <?php } ?>
<table>

<?php
  setcookie("auth","",time()-1);
  header("location:list.php");

<?php
  require("redis.php");
  $username = $_POST[&#39;username&#39;];
  $pass = $_POST[&#39;password&#39;];
  //根据注册时存储的以用户名为键的字符类型中查找用户id
  $id = $redis->get("username:".$username);
  if(!empty($id)){
    $password = $redis->hget("user:".$id,"password");
    if(md5($pass) == $password){
      $auth = md5(time().$username.rand());
      $redis->set("auth:".$auth,$id);
      setcookie("auth",$auth,time()+86400);
      header("location:list.php");
    }
  }
?>
<form action="" method="post">
  用户名:<input type="text" name="username"/><br>
  密码:<input type="password" name="password"><br>
  <input type="submit" value="登录"/>
</form>

<?php
  require("redis.php");
  $uid = $_GET[&#39;id&#39;];
  //echo $uid;
  $username = $redis->hget("user:".$id,"username");
  $a=$redis->del("user:".$uid);
  $redis->del("username:".$username);
  $redis->lrem("uid",$uid);
  //var_dump($a);
  header("location:list.php");

<?php
  require("redis.php");
  $uid = $_GET[&#39;id&#39;];
  $data=$redis->hgetall("user:".$uid);
?>
<form action="doedit.php" method="post">
  <input type="hidden" value="<?php echo $data[&#39;uid&#39;];?>" name="uid">
  用户名:<input type="text" name="username" value="<?php echo $data[&#39;username&#39;];?>"><br>
  年龄:<input type="text" name="age" value="<?php echo $data[&#39;age&#39;];?>"><br>
  <input type="submit" value="提交">
  <input type="reset" value="重填">
</form>

<?php
  require(&#39;redis.php&#39;);
  $uid = $_POST[&#39;uid&#39;];
  $username = $_POST[&#39;username&#39;];
  $age = $_POST[&#39;age&#39;];
  $a=$redis->hmset("user:".$uid,array("username"=>$username,"age"=>$age));
  if($a){
    header("location:list.php");
  }else{
    header("location:mod.php?id=".$uid);
  }

<?php
//关注功能，建议用集合实现，因为集合元素唯一，并且可以容易求出两个用户粉丝之间交集与差集，进而进行好友推荐功能
  $id = $_GET[&#39;id&#39;];
  $uid = $_GET[&#39;uid&#39;];
  require("redis.php");
  $redis->sadd("user:".$uid.":following",$id);
  $redis->sadd("user:".$id.":followers",$uid);
  header("location:list.php");