网页实现从数据库读取数据并简单分页

大致的思想就是：

　　1.设置每页要显示的最大记录数。

　　2.计算出页面总数

　　3.当前页面跟总页面数比较改变连接的状态

　　4.用limit控制从数据库中读取记录

代码：

$conn = mysql_connect('localhost','root','');mysql_select_db('db_BookStore',$conn);mysql_query("set names utf8");if(isset($_GET['page'])) { //判断是否存在page参数,获得页面值，否则取1    $page = intval($_GET['page']);} else {    $page = 1;}$page_size = 2; //最大记录条数$sql = "SELECT count(*) as amount FROM tb_BookInfo";$result = mysql_query($sql);$row = mysql_fetch_array($result);//计算总页数$amount = $row['amount'];if($amount) {    if($amount < $page_size) {        $page_count = 1;    }    if($amount % $page_size) {        $page_count = (int)($amount / $page_size) + 1;    } else {        $page_count = $amount / $page_size;    }} else {    $page_count = 0;}//翻页链接$page_string = "";if($page == 1) {    $page_string .= "首页 | 上一页";} else {    $page_string .= "<a href='?page=1'>首页</a> | <a href='?page=".($page-1)."'>上一页</a>";}$page_string .= "| $page |";if($page == $page_count) {    $page_string .= "下一页 | 尾页";} else {    $page_string .= "<a href='?page=".($page+1)."'>下一页</a> | <a href='?page=$page_count'>尾页</a>";}　 $sql = "select * from table order by id desc limit ". ($page-1)*$page_size .", $page_size";　 $result = mysql_query($sql);　 while ( $row = mysql_fetch_row($result) ) {    $rowset[] = $row;    }

代码二：

<?php$conn=mysql_connect('127.0.0.1','root','');mysql_query('use test',$conn);mysql_query('set names utf8',$conn);$perNumber=3; //每页显示的记录数$page=$_GET['page']; //获得当前的页面值$count=mysql_query("select count(*) from kangbiao"); //获得记录总数$rs=mysql_fetch_array($count); $totalNumber=$rs[0];$totalPage=ceil($totalNumber/$perNumber); //计算出总页数if (!isset($page)) { $page=1;} //如果没有值,则赋值1$startCount=($page-1)*$perNumber; //分页开始,根据此方法计算出开始的记录$result=mysql_query("select * from kangbiao limit $startCount,$perNumber"); //根据前面的计算出开始的记录和记录数echo "<table border='1'>";echo "<tr>";echo "<th>id</th>";echo "<th>name</th>";echo "<th>age</th>";echo "<th>grade</td>";echo "</tr>";while ($row=mysql_fetch_array($result)) {echo "<tr>"; echo "<td>$row[0]</td>";  echo "<td>$row[1]</td>"; echo "<td>$row[2]</td>"; echo "<td>$row[3]</td>";  //显示数据库的内容echo "</tr>";}echo "</table>";if ($page != 1) { //页数不等于1?><a href="02.php?page=<?php echo $page - 1;?>">上一页</a> <!--显示上一页--><?php}for ($i=1;$i<=$totalPage;$i++) {  //循环显示出页面?><a href="02.php?page=<?php echo $i;?>"><?php echo $i ;?></a><?php}if ($page<$totalPage) { //如果page小于总页数,显示下一页链接?><a href="02.php?page=<?php echo $page + 1;?>">下一页</a><?php} ?>