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老师批语：
<?php
require 'model/page.php';
use model\Page;
$obj= new Page(3);
$obj->connect('mysql','127.0.0.1','php','root','');
$total_page=$obj->getPage('student');
$res=$obj->getData('student');
?>
<!doctype html>
<html lang="en">
<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>Document</title>
<style>
table ,tr ,th ,td {border: 1px black solid;}
td{padding: 5px auto;}
table{border-collapse: collapse; margin: auto;text-align: center;width: 60%;}
table tr:first-child{background: #1b6d85;}
caption{margin:15px auto;font-size: 1.5em;}
div{text-align: center;}
p,form{display: inline-block;}
a{text-decoration-line: none;}
a:hover{text-decoration-line: underline;}
</style>
</head>
<body>
<table>
<caption>My Student</caption>
<tr>
<th>id</th>
<th>名字</th>
<th>性别</th>
<th>年纪</th>
<th>班级</th>
</tr>
<?php foreach ($res as $current): ?>
<tr>
<td> <?php echo $current['id'] ?></td>
<td> <?php echo $current['name'] ?></td>
<td> <?php echo $current['gender'] ?></td>
<td> <?php echo $current['age'] ?></td>
<td> <?php echo $current['class'] ?></td>
</tr>
<?php endforeach; ?>
</table>
<div>
<p>
<a href="http://localhost/phpstudy/0910/demo2.php?p=1">首页</a>
<a href="http://localhost/phpstudy/0910/demo2.php?p=<?php echo ($obj->page==1)?1:($obj->page-1) ?>">上一页</a>
<?php for ($i=1;$i<=$total_page;$i++): ?>
<a href="http://localhost/phpstudy/0910/demo2.php?p=<?php echo $i ?>" <?php if($obj->page==$i) echo 'style="background:black;color:white;"' ?>><?php echo $i;?></a>
<?php endfor;?>
<a href="http://localhost/phpstudy/0910/demo2.php?p=<?php echo ($obj->page==$total_page)?$total_page:($obj->page+1) ?>">下一页</a>
<a href="http://localhost/phpstudy/0910/demo2.php?p=<?php echo $total_page; ?>">末页</a>
</p>
<form action="" method="get">
第
<select name="p">
<?php for($i=1;$i<=$total_page;$i++): ?>
<option <?php if($i==$obj->page) echo "selected"?> >
<?php echo $i; ?>
</option>
<?php endfor; ?>
</select>
页
<input type="submit" value="跳转" name="submit">
</form>
</div>
</body>
</html>点击 "运行实例" 按钮查看在线实例
offset 偏移量=（当前页-1）*每页显示数量。
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