新手,刚开始代码写出来时什么问题都没有,结果今天再浏览时就出现下面的状况,是哪里错了呢?
zxcvbnm欢迎到来点击进入主页点击返回重试"); } 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 $username."欢迎到来点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?> 点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?> [color=#800000]
以下是代码:
nbsp;html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
session_start();
if($_GET['action'==logout]){
unset($_SESSION['username']);
unset($_SESSION['userid']);
exit('注销成功!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 $username."欢迎到来点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?> 点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?>
回复讨论(解决方案)
exit("登录失败!点击返回重试");
}
?>
点击返回重试"); } if(!isset($_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 $username."欢迎到来点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?> 点击进入主页"; }else{ exit("登录失败!点击返回重试"); } ?>
对比用的忘删了,删了之后浏览时还会出现上面一段
if($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
你现在的代码是什么呀?发一篇整理后的代码
没用,删了之后,还会出现这种状况,貌似浏览器在识别到第一个html代码>,就把它当做?>,结束执行了,后面的代码才在浏览器中,以文字显示
session_start();
if($_GET['action'==logout]){
unset($_SESSION['username']);
unset($_SESSION['userid']);
exit('注销成功!点击返回重试');
}
if(!isset($_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 $username."欢迎到来点击进入主页";
}else{
exit("登录失败!点击返回重试");
}
?>
这是整个页面的代码?不全的吧?
页面上显示的应该就是你一开始发的代码的后半部分~~整个删掉还有问题的话,查一下缓存,或者把代码复制到一个测试文件里,运行一下,(建议直接放在服务器工作目录下,不要工程)用localhost来访问,看看还出来吗?
之前缓存清理过了,没用,换个文件夹也一样,文件本来就是放在服务器工作目录下的用localhost来访问,
以下是login.php:
if($_COOKIE['username']!=""){
$username=$_COOKIE['username'];
}
if($_COOKIE['pwd']!=""){
$pwd=$_COOKIE['pwd'];
}
?>
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:
session_start();
if($_GET['action']==logout){
unset($_SESSION['username']);
unset($_SESSION['userid']);
exit('注销成功!点击返回重试');
}
if(!isset($_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");
}
?>
以下是链接数据库的:
$conn=@mysql_connect("localhost","root","137733") or die("l½???§°?¡".mysql_error());
mysql_select_db("hexie",$conn);
mysql_query("set character set utf8");
mysql_query("set names utf8");
?>
大概看了下没啥错误
$check_user=@mysql_query("select userid from users where username ='".$username."' and pwd ='".$pwd."' limit 1",$conn);
if($result=mysql_fetch_array($check_user)){
$_SESSION['username']=$result['$username'];
$_SESSION['userid']=$result['userid'];
echo $username."欢迎到来点击进入主页";
}else{
exit("登录失败!点击返回重试");
}
只是这里select userid from 你只查询一个字段,下面的$result['$username'];
就没法用了有错误
这不是问题关键啊,
exit('注销成功!点击返回重试');
history.back(-1);" >到这个 >截止,浏览器就认为php这段代码就结束了,后面就算有错也识别不出来了
f($_GET['action'==logout]){???
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?
原来就是复制粘贴的,我一开始是犯了一些弱智错误,后来我检查时发现又改了,现在浏览器预览的效果是
点击进入主页";
}else{
exit("登录失败!点击返回重试");
}
?>
只有你“复制粘贴”的才有可能帮你找出错误
不是有专门的放代码的标签的么 用那个复制进来 这样看着好乱... 眼花...
session_start();
放到第一行
居然还能回复,我最近也遇到这个问题了,终于找到原因了。混合编码后缀名必须是.php,.html就会出现php代码解析错误的问题。 在这儿看到的,OK了。 http://zhidao.baidu.com/link?url=GTeO4AmQJjdjvHXK3SrLQ5bonVuD_35RtDED1gcsu6Z4bLsJ0hBwlon8wp7aErvbNTjz9R0RP8CqQqNIXdhRyq

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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