<?php
error_reporting(0);//加上error_reporting(0);就不会弹出警告了
header("Content-type:text/html;charset=utf-8");//防止中文乱码
$con = mysqli_connect("localhost","mysql名","mysql密码","要链接的数据库名");
mysqli_query($con,'set names utf8');
if (!$con){
echo'链接数据库失败！';
}
?>
<!DOCTYPE html>
<html>
<head></head>
<body>
<form action="" method="get" >
<select name="id" >
<option >请选择</option>
<?php
$sql="select * from userinfo ";
$res=mysqli_query($con,$sql);
while($row=$res->fetch_assoc()){
//var_dump($row);
?>
<option>
<?php echo $row["id"];?>
<?php echo $row["username"];?>
</option>
<?php
}
?>
</select>
<input type="submit" value="提交">
</form>
<?php
$id = $_GET["id"];
//根据id查到当前要操作的数据
$sql= "select * from userinfo where id = '$id'";
//查询
$result=$con->query($sql);
// var_dump($result);//dedao
//得到具体信息
$res = $result->fetch_assoc();
?>
<input type="hidden" value="<?php echo $res['id'];?> " name="id" >
<label><b>修改的用户姓名</b></label>
<input type="text" value="<?php echo $res['username'];?> " name="username">
<label><b>用户密码</b></label>
<input type="text" value="<?php echo $res['password'];?> " name="password" >
<label><b>用户级别:</b></label>
<input type="text" value="<?php echo $res['level'];?> " name="level">
</body>
</html>实现图样式：
