php分页

<?php
    $conn = mysql_connect("localhost", "root", "") or die("连接错误");
    mysql_select_db("test");
    mysql_query("set names utf8");

    //获取总数量
    $sql = "select count(*) from wei_test";
    $result = mysql_query($sql, $conn);
    $row = mysql_fetch_row($result);
    $amount = $row[0];

    $page_count = 4;

    //获取总页数
    $page_amount = ceil($amount/$page_count);
    
    if(!empty($_GET["page"])){
        $page = $_GET["page"];
    }else{
        $page = 1;
    }

    $sql = "select name from wei_test limit ".($page-1)*$page_count.",".$page_count;
    $result = mysql_query($sql, $conn);
    while($row = mysql_fetch_assoc($result)){
        echo "name:".$row['name']."<br/>";
    }
    for($i=1;$i<=$page_amount;$i++){
        echo "<a href='fenye.php?page=$i'>$i</a>&nbsp;";
    }
    mysql_close($conn);
?>