php+mysql实现分页代码

<?php
/**
* 1.获取页数
*/
$page = empty($_GET['p'])?1:($_GET['p']);
/**
* 2.处理数据
*/
// 链接数据库
$host = "127.0.0.1";
$user = "root";
$pwd = "root";
$db = "test";
$mysqli = mysqli_connect($host $user $pwd $db);
if (!$mysqli) {
echo "数据库连接错误";
exit();
}
// 设置参数
$pageSize = 10;
// 查询并显示数据(分页公式:(当前页-1)*每页显示的条数 每页显示的条数)
$sql = "select * from page limit ".($page-1)*$pageSize.""."{$pageSize}";
$result = mysqli_query($mysqli $sql);
echo "<table border=1 cellspacing=1 width=30%>";
echo "<tr><td>编号</td><td>姓名</td></tr>";
while ($row = mysqli_fetch_assoc($result)) {
echo "<tr>";
echo "<td>{$row['id']}</td><td>{$row['name']}</td>";
echo "</tr>";
}
echo "</table>";
// 查询总的页数
$total_sql = "select count(*) from page";
$total_result = mysqli_fetch_array(mysqli_query($mysqli$total_sql));
$total = ceil($total_result[0]/$pageSize);
mysqli_close($mysqli);
/**
* 3.输出分页
*/
$showPage =5;// 显示页数
$banner_page = "<div class='page'>";
$pageOffSet = ($showPage-1)/2;//偏移量
if ($page>1) {
$banner_page.= "<a href='".$_SERVER['PHP_SELF']."?p=1'>首页</a>";
$banner_page.= "<a href='".$_SERVER['PHP_SELF']."?p=".($page-1)."'>上一页</a>";
}
// 初始化数据
$start = 1;
$end = $total;
// 数字前的省略(该部分内容顺序不可修改!!!)
if ($total>$showPage) {
if($page>$pageOffSet+1){
$banner_page .= "...";
} if($page>$pageOffSet) {
$start = $page-$pageOffSet;
$end = $total>$page+$pageOffSet?$page+$pageOffSet:$total;
}else{
$start = 1;
$end = $total>$showPage?$showPage:$total;
}if($page+$pageOffSet>$total){
$start = $start-($page+$pageOffSet-$end);
}
}
// 中间省略
for ($i=$start; $i <= $end; $i++) {
$banner_page.= "<a href='".$_SERVER['PHP_SELF']."?p=".($i)."'>{$i}</a>";
}
// 尾部的省略
if ($total>$showPage && $total>($page+$pageOffSet)) {
$banner_page.= "...";
}
if ($page<$total) {
$banner_page.= "<a href='".$_SERVER['PHP_SELF']."?p=".($page+1)."'>下一页</a>";
$banner_page.= "<a href='".$_SERVER['PHP_SELF']."?p={$total}'>尾页</a>";
}
// 自定义跳转页数
$banner_page.="共{$total}页跳转到<form method='get' action='".$_SERVER['PHP_SELF']."'><input type='text' name='p' size='5' />页<input type='submit' value='跳转'/></form></div>";
echo "$banner_page";
?>