php分页代码学习示例分享_PHP教程
header("content-type:text/html;charset=utf-8");
//数据库连接
$conn = mysql_connect("localhost", "root", "111") or die("not connnected : ".mysql_error());
mysql_select_db("test", $conn);
mysql_query("set names utf8");
//查询共有多少行数据
$sql1 = "select count(*) from user";
$ret1 = mysql_query($sql1);
$row1 = mysql_fetch_row($ret1);
$tot = $row1[0];
//每页多少行数据
$length = 5;
//总页数
$totpage = ceil($tot / $length);
//当前页数
$page = @$_GET['p'] ? $_GET['p'] : 1;
//limit 下限
$offset = ($page - 1) * $length;
echo "
echo "
php padding
";echo "
| ID | ";USER | ";PASS | ";
|---|---|---|
| {$row2['id']} | {$row2['name']} | {$row2['pass']} | ";
//上一页和下一页
$prevpage = $page - 1;
if ($page >= $totpage) {
$nextpage = $totpage;
} else {
$nextpage = $page + 1;
}
//跳转
echo "
上一页|下一页
";echo "
核心点：
“$sql2 = "select * from user order by id limit {$offset}, {$length}";”，$offset、$length和页数之间的关系。
上一页和下一页的获得方式，以及临界点。