PHP实现数据分页显示详细操作-php教程

资源魔 2020-07-09 20:28:23 25 0

分页正在后盾治理中是常常应用的性能，分页显示不便年夜量数据的治理。

实例代码以下：

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>用户列表</title>
</head>
<body>
    <?php 
        $con = mysqli_connect("localhost","root","");   
        mysqli_query("set names utf8");    mysqli_select_db("zhiye",$con);    
        $pageSize = 1;      //每一页显示的数目
        $rowCount = 0;      //要从数据库中猎取
        $pageNow = 1;        //以后显示第几页
        //假如有pageNow就应用，不就默许第一页。
        if (!empty($_GET['pageNow'])){        
            $pageNow = $_GET['pageNow'];
        }
        $pageCount = 0;   //示意共有几何页
        $sql1 = "select count(id) from user";    
        $res1 = mysqli_query($sql1);
        if($row1=mysqli_fetch_row($res1)){     
           $rowCount = $row1[0];
        }
         //较量争论共有几何页，ceil取进1
        $pageCount = ceil(($rowCount/$pageSize));
        //应用sql语句时，留意有些变量应掏出赋值。
        $pre = ($pageNow-1)*$pageSize;
        $sql2 = "select * from user limit $pre,$pageSize";    
        $res2 = mysqli_query($sql2);
        while($row=mysqli_fetch_assoc($res2)){    
            echo $row['user_name']."<br>";       
            echo $row['name']."<br>";       
            echo $row['email']."<br>";      
            echo $row['password']."<br>";  
            echo $row['tel']."<br>";
             }
            for ($i=1;$i<=$pageCount;$i++){  
              echo "<a href='userList.php?pageNow=$i'>$i</a>&nbsp;";
            }?>
</body>
</html>

当有年夜量数据时，就不克不及应用上述办法

<?php 
    $con = mysqli_connect("localhost","root","");
   
    mysqli_query("set names utf8");
    mysqli_select_db("zhiye",$con);
    
    $pageSize = 1;      //每一页显示的数目
    $rowCount = 0;      //要从数据库中猎取
    $pageNow = 1;        //以后显示第几页
    
    //假如有pageNow就应用，不就默许第一页。
    if (!empty($_GET['pageNow'])){
        $pageNow = $_GET['pageNow'];
    }
    
    $pageCount = 0;   //示意共有几何页
    
    $sql1 = "select count(id) from user";
    $res1 = mysqli_query($sql1);
    
    if($row1=mysqli_fetch_row($res1)){
        $rowCount = $row1[0];
    }
    
    //较量争论共有几何页，ceil取进1
    $pageCount = ceil(($rowCount/$pageSize));
    
    //应用sql语句时，留意有些变量应掏出赋值。
    $pre = ($pageNow-1)*$pageSize;
    
    $sql2 = "select * from user limit $pre,$pageSize";
    $res2 = mysqli_query($sql2);
    
    //$sql = "select * from user";
    //$res = mysqli_query($sql,$con);
  
   while($row=mysqli_fetch_assoc($res2)){
        echo $row['user_name']."<br>";
        echo $row['name']."<br>";
        echo $row['email']."<br>";
        echo $row['password']."<br>";
        echo $row['tel']."<br>";
   }
   if($pageNow>1){
       $prePage = $pageNow-1;
       echo "<a href='userList.php?pageNow=$prePage'>pre</a>&nbsp;";
   }
   if($pageNow<$pageCount){
       $nextPage = $pageNow+1;
       echo "<a href='userList.php?pageNow=$nextPage'>next</a>&nbsp;";
       echo "以后页{$pageNow}/共{$pageCount}页";
   }
   echo "<br/><br/>";
   ?>
 
   <form action="userList.php">
        <input type="text" name="pageNow">
        <input type="submit" value="GO">
   </form>

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