<?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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1条回答 默认 最新
- PHP技术栈 2022-05-30 13:16关注
看了一下,主要是两个问题:
1、select下拉选择放在form表单外边了,导致下单选择的信息没有正常提交;
2、表单用的是POST提交,上边开头没有写接收POST表单信息。
以下是我改过之后代码,你试一下:<?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; //检测提交类型 POST/GET $pagenoType = isset($_POST['sel'])?$_POST['sel']:$_GET['pageno']; $pageno = $pagenoType ? $pagenoType : 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_name . "</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> "; //使数组的键名与值相同 $arr[$pageno]=$pageno; } //print_r($arr); echo"<form name='form1' method='POST' action=''>"; echo "<select name='sel'>"; foreach($arr as $key=>$value){ if(isset($_POST['sel']) && !empty($_POST['sel']) && $value == $_POST['sel']){ echo "<option value=\"$key\" selected='selected'>第{$value}页</option>"; }else{ echo "<option value=\"$key\">第{$value}页</option>"; } } echo "<input type='submit' name='bt' value='提交' > <a href='?pageno=$pageno'> </form>"; if(isset($_POST['bt'])) echo "</select>"; echo "</th></tr>"; echo "</table>"; ?>
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