php开发分页实现代码

<?php 
$conn = @ mysql_connect("localhost", "root", "") or die("数据库链接错误"); 
mysql_select_db("form", $conn); 
mysql_query("set names 'GBK'"); //使用GBK中文编码; 
//替换空格，回车键 
function htmtocode($content) { 
$content = str_replace("\n", "<br>", str_replace(" ", " ", $content)); 
return $content; 
} 
?> 

1 <?php 
2 
3 function _PAGEFT($totle, $displaypg = 20, $url = '') { 
4 
5 global $page, $firstcount, $pagenav, $_SERVER; 
6 
7 $GLOBALS["displaypg"] = $displaypg; 
8 
9 if (!$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]; 
} 
?> 

<?php 
include("conn.php"); 
$pagesize=5; 
$url=$_SERVER["REQUEST_URI"]; 
$url=parse_url($url); 
$url=$url[path]; 
$numq=mysql_query("SELECT * FROM `test`"); 
$num = mysql_num_rows($numq); 
if($_GET){ 
$pageval=$_GET; 
$page=($pageval-1)*$pagesize; 
$page.=','; 
} 
if($num > $pagesize){ 
if($pageval<=1)$pageval=1; 
echo "共 $num 条". 
" <a href=$url?page=".($pageval-1).">上一页</a> <a href=$url?page=".($pageval+1).">下一页</a>"; 
} 
$SQL="SELECT * FROM `test` limit $page $pagesize "; 
$query=mysql_query($SQL); 
while($row=mysql_fetch_array($query)){ 
echo "<hr><b>".$row[name]." | ".$row[sex]; 
} 
?>