php分页

conn.php文件：

<?php


//连接数据库

$_conn = @mysql_connect("localhost","root","") or die("数据库连接错误");
//选择数据库
mysql_select_db("bbs",$_conn);
//设置中文编码
mysql_query("set names 'GBK'");
?>

page.php文件：

<?php

function _PAGEFT($totle, $displaypg = 20, $url = '') {

global $page, $firstcount, $pagenav, $_SERVER;

$GLOBALS["displaypg"] = $displaypg;

if (!$page)
$page = 1;
if (!$url) {
$url = $_SERVER["REQUEST_URI"];
}

//URL分析：
$parse_url = parse_url($url);
$url_query = $parse_url["query"]; //单独取出URL的查询字串
if ($url_query) {
$url_query = ereg_replace("(^|&)page=$page", "", $url_query);
$url = str_replace($parse_url["query"], $url_query, $url);
if ($url_query)
$url .= "&page";
else
$url .= "page";
} else {
$url .= "?page";
}
$lastpg = ceil($totle / $displaypg); //最后页，也是总页数
$page = min($lastpg, $page);
$prepg = $page -1; //上一页
$nextpg = ($page == $lastpg ? 0 : $page +1); //下一页
$firstcount = ($page -1) * $displaypg;

//开始分页导航条代码：
$pagenav = "显示第 <B>" . ($totle ? ($firstcount +1) : 0) . "</B>-<B>" . min($firstcount + $displaypg, $totle) . "</B> 条记录，共 $totle 条记录";

//如果只有一页则跳出函数：
if ($lastpg <= 1)
return false;

$pagenav .= " <a href='$url=1'>首页</a> ";
if ($prepg)
$pagenav .= " <a href='$url=$prepg'>前页</a> ";
else
$pagenav .= " 前页 ";
if ($nextpg)
$pagenav .= " <a href='$url=$nextpg'>后页</a> ";
else
$pagenav .= " 后页 ";
$pagenav .= " <a href='$url=$lastpg'>尾页</a> ";

//下拉跳转列表，循环列出所有页码：
$pagenav .= "　到第 <select name='topage' size='1' onchange='window.location=\"$url=\"+this.value'>\n";
for ($i = 1; $i <= $lastpg; $i++) {
if ($i == $page)
$pagenav .= "<option value='$i' selected>$i</option>\n";
else
$pagenav .= "<option value='$i'>$i</option>\n";
}
$pagenav .= "</select> 页，共 $lastpg 页";
}


include("conn.php");

$result=mysql_query("SELECT * FROM `test`");
$total=mysql_num_rows($result);
//调用pageft()，每页显示10条信息（使用默认的20时，可以省略此参数），使用本页URL（默认，所以省略掉）。
_PAGEFT($total,5);
echo $pagenav;

$result=mysql_query("SELECT * FROM `test` limit $firstcount,$displaypg ");
while($row=mysql_fetch_array($result)){

echo "<hr><b>".$row[name]." | ".$row[sex];

}


?>