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}
?>
点击返回重试"); } if(!isset($_POST['submit'])){ exit('非法登录!'); } $怎么看着乱七八糟的代码啊
点击返回重试"); } if(!isset($_POST['submit'])){ exit('非法登录!'); } $username=htmlspecialchars($_POST['username']); $pwd=MD5($_POST['pwd']); include('conn.php'); $check_user=mysql_query("select userid from users where username ='".$username."' and pwd ='".$pwd."' limit 1",$conn); if($result=mysql_fetch_array($check_user)){ $_SESSION['username']=$result['$username']; $_SESSION['userid']=$result['userid']; echo $username."欢迎到来点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?> 点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?>
对比用的忘删了,删了之后浏览时还会出现上面一段
$_SESSION['username']=$result['$username'];
$_SESSION['userid']=$result['userid'];
echo $username."欢迎到来<a href='index.php'>点击进入主页</a>";
}else{
exit("登录失败!<a href='javascript:history.back(-1);'>点击返回重试</a>");
}
?>
点击返回重试"); } if(!isset($_POST['submit'])){ exit('非法登录!'); } $username=htmlspecialchars($_POST['username']); $pwd=MD5($_POST['pwd']); include('conn.php'); $check_user=mysql_query("select userid from users where username ='".$username."' and pwd ='".$pwd."' limit 1",$conn); if($result=mysql_fetch_array($check_user))
红色的?>多余,去掉就可以了,有它导致它下面的代码都成为了普通的html
session_start();
if($_GET['action'==logout]){
unset($_SESSION['username']);
unset($_SESSION['userid']);
exit('注销成功!<a href="javascript:history.back(-1);">点击返回重试</a>');
}
if(!isset($_POST['submit'])){
exit('非法登录!');
}
$username=htmlspecialchars($_POST['username']);
$pwd=MD5($_POST['pwd']);
include('conn.php');
$check_user=@mysql_query("select userid from users where username ='".$username."' and pwd ='".$pwd."' limit 1",$conn);
if($result=mysql_fetch_array($check_user)){
$_SESSION['username']=$result['$username'];
$_SESSION['userid']=$result['userid'];
echo $username."欢迎到来<a href='index.php'>点击进入主页</a>";
}else{
exit("登录失败!<a href='javascript:history.back(-1);'>点击返回重试</a>");
}
?>
<?php
if($_COOKIE['username']!=""){
$username=$_COOKIE['username'];
}
if($_COOKIE['pwd']!=""){
$pwd=$_COOKIE['pwd'];
}
?>
<fieldset>
<legend>用户登录</legend>
<form action="login_ok.php" method="post" name="loginform" onsubmit="return checkit(this)">
<p>
<label for="username">用户登录:</label>
<input type="text" name="username" id="username"
<?php
if($_COOKIE['username']!=""){
echo "value='".$username."' ";
}
?>
<?php
echo "/>";
?>
</p>
<p>
<label for="pwd">用户密码:</label>
<input type="password" name="pwd" id="pwd"
<?php
if($_COOKIE['pwd']!=""){
echo "value='".$pwd."' ";
}
?>
<?php
echo "/>";
?>
</p>
<p>
<label for="remember">有效期:</label>
<select name="remember">
<option value="0" <?php if(!$_COOKIE['remember']){echo "selected";}?><?php echo " >"; ?>浏览器进程</option>
<option value="1" <?php if($_COOKIE['remember']==1){echo "selected";}?><?php echo " >"; ?>保存一天</option>
<option value="30" <?php if($_COOKIE['remember']==30){echo "selected";}?><?php echo " >"; ?>保存一月</option>
<option value="365" <?php if($_COOKIE['remember']==365){echo "selected";}?><?php echo " >"; ?>保存一年</option>
</select>
</p>
<p>
<label><input type="submit" name="submit" id="submit" value="登陆"/>
<input type="reset" name="reset" id="reset" value="重置"/><label>
</p>
</form>
</fieldset>
<?php
if(isset($_POST['submit']) and $_POST['submit']=="submit"){
$username=$_POST['username'];
$pwd=$_POST['pwd'];
if($_COOKIE['pwd']!=$pwd){
$pwd=MD5($_POST['pwd']);
}
if($remember!=0){
$remember=$_POST['remember'];
setCookie("username",$username,time()+$remember*3600*24);
setCookie("pwd",$pwd,time()+$remember*3600*24);
setCookie("remember",$pwd,time()+$remember*3600*24);
}
}
?>
以下是login_ok.php:
<?php
session_start();
if($_GET['action']==logout){
unset($_SESSION['username']);
unset($_SESSION['userid']);
exit('注销成功!<a href="javascript:history.back(-1);">点击返回重试</a>');
}
if(!isset($_POST['submit'])){
exit('非法登录!');
}
$username=htmlspecialchars($_POST['username']);
$pwd=MD5($_POST['pwd']);
include('conn.php');
$check_user=@mysql_query("select userid from users where username ='".$username."' and pwd ='".$pwd."' limit 1",$conn);
if($result=mysql_fetch_array($check_user)){
$_SESSION['username']=$result['$username'];
$_SESSION['userid']=$result['userid'];
echo $username."欢迎到来<a href='index.php'>点击进入主页</a>";
}else{
exit("登录失败!<a href='javascript:history.back(-1);'>点击返回重试</a>");
}
?>
以下是链接数据库的:
<?php
$conn=@mysql_connect("localhost","root","137733") or die("l½Ԋ��§°ܣ¡".mysql_error());
mysql_select_db("hexie",$conn);
mysql_query("set character set utf8");
mysql_query("set names utf8");
?>
$check_user=@mysql_query("select userid from users where username ='".$username."' and pwd ='".$pwd."' limit 1",$conn);
if($result=mysql_fetch_array($check_user)){
$_SESSION['username']=$result['$username'];
$_SESSION['userid']=$result['userid'];
echo $username."欢迎到来<a href='index.php'>点击进入主页</a>";
}else{
exit("登录失败!<a href='javascript:history.back(-1);'>点击返回重试</a>");
}只是这里select userid from 你只查询一个字段,下面的$result['$username'];
就没法用了有错误
exit('注销成功!<a href="javascript:history.back(-1);">点击返回重试</a>');
history.back(-1);">到这个>截止,浏览器就认为php这段代码就结束了,后面就算有错也识别不出来了
这是什么语法?
if($_GET['action']==logout){
这又是什么语法?为什么你在提问时要手写你的代码,而不是复制粘贴呢?
点击进入主页";
}else{
exit("登录失败!<a href='javascript:history.back(-1);'>点击返回重试</a>");
}
?>
放到第一行