用户输入用户名和密码后，点击提交按钮(go)..调用数据库类(在temp.php中)中的一个方法confirm()来检查用户名和密码是否匹配。如果匹配，'tm.php'必须加载，否则必须显示一个警告框，提示用户名和密码不匹配!警报框必须在第一。php，这是用户输入登录信息的页面。代码片段:
temp.php:
class database{
function confirm($uname,$pwd){
//include('tm.php');
$con = new mysqli("localhost","root","","hotels");
$res = $con->query("select * from user");
$row=$res->fetch_assoc();
$flag=0;
while($row)
{
if($row['username'] == $uname && $row['password'] == $pwd)
{$flag=1;
include('tm.php');
break;
}
$row=$res->fetch_assoc();
}
if($flag==1)?>
<script>alert("Username and Password do not match!");</script>
<?php
}
}
?>
}
first.php:
<form action="first.php">
Username: <input type="text" name="uname"><br>
Password: <input type="text" name="pwd"><br>
<input type="submit" name="go" value="GO">
</form>
<?php
require('temp.php');
if (isset($_POST['go']))
{
$db=new database();
$uname=$_POST['uname'];
$pwd=$_POST['pwd'];
$db->confirm($uname,$pwd);
}
?>
警告框没有出现，也没有被定向到tm.php.请帮我整理一下!
试试这个，
class database{
function confirm($uname,$pwd){
//include('tm.php');
$con = new mysqli("localhost","root","","hotels");
$res = $con->query("select * from user");
$row=$res->fetch_assoc();
$flag=0;
while($row)
{
if($row['username'] == $uname && $row['password'] == $pwd)
{
$flag=1;
include('tm.php');
break;
}
$row=$res->fetch_assoc();
}
if($flag==1)
{
echo "<script>alert('Username and Password do not match!');</script>";
header("refresh:0;url=first.php");
}
}
}
class database{
function confirm($uname,$pwd){
//include('tm.php');
$con = new mysqli("localhost","root","","hotels");
$res = $con->query("select * from user");
$row=$res->fetch_assoc();
$flag=0;
while($row)
{
if($row['username'] == $uname && $row['password'] == $pwd)
{
$flag=1;
// your include syntax was also wrong.
include 'tm.php';
break;
}
$row=$res->fetch_assoc();
}
// And here is your logical error. Changed it from 0 to 1.
if($flag==0)
{
echo "<script>alert('Username and Password do not match!');</script>";
header("refresh:0;url=first.php");
}
}
}