<?php
$link = mysqli_connect('localhost','root','root','db_chengji','3306');
mysqli_set_charset($link,'utf8');
$sql1 = "select * from `tb_info` ORDER BY `id` ASC ";
$mysqli_result1 = mysqli_query($link,$sql1);
$recount = mysqli_num_rows($mysqli_result1);
$pagesize = 7;
$pageno = $_GET['pageno'] ? $_GET['pageno'] : 1;
$pagecount = ceil($recount / $pagesize);
$offset = ($pageno-1) * $pagesize;
$sql = "select * from `tb_info` ORDER BY `id` ASC limit $offset,$pagesize";
$mysqli_result1 = mysqli_query($link,$sql);
echo "<table align='center' border='1' style='border-collapse: collapse' width='450'>";
echo "<tr>";
while($field = mysqli_fetch_field($mysqli_result1))
echo "<th>".$field->name."</th>";
echo "</tr>";
$j = 0;
while($row = mysqli_fetch_object($mysqli_result1)) {
$j++;
echo "<tr>";
echo "<td>" . $row->id . "</td>";
echo "<td>" . $row->name . "</td>";
echo "<td>" . $row->sex . "</td>";
echo "<td>" . $row->class . "</td>";
echo "<td>" . $row->hobby . "</td>";
echo "</tr>";
}
for($i = $j;$i<$pagesize;$i++){
echo "<tr>";
echo "<td> </td><td> </td><td> </td><td> </td><td> </td>";
echo "</tr>";
}
$arr=array();
echo "<tr><th colspan='5'>";
for($pageno = 1;$pageno <= $pagecount;$pageno ++){
echo "<a href='?pageno=$pageno'>$pageno</a> ";
$arr[]=$pageno;
}
//print_r($arr);
echo "<select name='sel'>";
foreach($arr as $key=>$value){
echo "<option value=\"key\">第{$value}页</option>";
}
echo"<form name='form1' method='post' action=''>
<input type='submit' name='bt' value='提交' >
<a href='?pageno=$pageno'>
</form>";
if(isset($_POST['bt']))
echo "</select>";
echo "</th></tr>";
echo "</table>";
PHP 怎么修改这段代码 让下拉菜单点击提交后可以跳转到相应页面
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