PHP实现分页功能
1.PHP代码块
<?php
header("content-type:text/html;charset=utf8");
$pdo = new PDO("mysql:host=127.0.0.1;dbname=user;",'root','root');
$resobj=$pdo->query("select * from article");
$data=$resobj->fetchAll(PDO::FETCH_ASSOC);
//页数
$tiaoshu =3;
$count=count($data);
$yeshu=ceil($count/$tiaoshu);
if(isset($_GET['page'])){
//当前请求的页码
$page =$_GET['page'];
if($page<1){
$page=1;
}elseif($page>$yeshu){
$page=$yeshu;
}
}else{
$page=1;
}
//拿到页码是不是可以去执行数据库的匹配了 利用offset
//偏移量如何计算出来的 (1-1)*3 (2-1)*3 (3-1)*3
$offset=($page-1)*$tiaoshu;
$sql ="select * from article limit {$tiaoshu} offset $offset";
$resobj=$pdo->query($sql);
$data=$resobj->fetchAll(PDO::FETCH_ASSOC);
foreach ($data as $k=>$v){
echo "<div>
<h1>{$v['aname']}</h1>
<h2>{$v['content']}</h2>
</div>";
}
?>
2.HTML
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>分页功能</title>
</head>
<body>
<ul>
<a href="?page=<?=$page-1?>" onclick=""><span>上一页</span></a>
<?php for ($i=1;$i<=$yeshu;$i++) : ?>
<a href="?page=<?=$i?>"><span><?=$i?></span></a>
<?php endfor; ?>
<a href="?page=<?=$page+1?>" onclick=""><span>下一页</span></a>
</ul>
</body>
</html>