我的页面,在本地时插入和更新数据都没有问题。上传服务器后,这个页面更新数据可以,但是不能插入数据。大侠们能给个解决思路么?谢谢。
回复讨论(解决方案)
先看一下有无插入权限
您是说是空间里数据库设置的问题么?我的EDIT页面上传空间后只能更新而不能插入,login页面上传空间后也可以插入。
我的edit页面代码为
session_start () ;
include("IncDB.php");
//处理提交的修改 @allprojects @todo multi-query
@$uid=$_SESSION['id'];
if(!empty($_POST['submit'])) {
$bid=$_POST['bid'];
$bidt=addslashes($_POST['title']);
$bidl=addslashes($_POST['links']);
$result1=mysql_query("SELECT * FROM userlinks where id='$bid' and userid='".$_SESSION['id']."'",$link);
$row1=mysql_fetch_row($result1);
if($row1==null)
{
$sql ="INSERT INTO `userlinks` (`id`,`title`, `links`,`userid`,`datetime`) VALUES ('$bid','$bidt','$bidl','".$_SESSION['id']."',now());";}
else{
$sql="update userlinks set title = '$bidt' ,links = '$bidl',userid='".$_SESSION['id']."',datetime=now() where id= '$bid';";
}
if(mysql_query($sql)){
echo "<script>parent.location.reload();</script>";
}else echo "<script>parent.location.reload();</script> ";
exit();
}
$bid=addslashes($_GET['id']);
$result=mysql_query("SELECT * FROM userlinks where id ='".$bid."'and userid='$uid' order by datetime desc limit 1",$link);
@$row=mysql_fetch_row($result);
?>
红色的代码即是。我从后台添加数据后,再用update没有问题;但是不能插入。而上面这个代码在本地测试时插入和更新都没有问题。
把
if(mysql_query($sql)){
echo "<script>parent.location.reload();</script>";
}else echo "<script>parent.location.reload();</script> ";
改成
if(mysql_query($sql)){
echo "<script>parent.location.reload();</script>";
}else echo mysql_error(); //echo "<script>parent.location.reload();</script> ";
看看
因为你说本地可以,服务器不可以。所以应先检查权限
既然后台能插入,那么就应考虑是否是程序问题了
好的,我试试,谢谢!!
真牛X!又解决了。佩服佩服!

Reasons for PHPSession failure include configuration errors, cookie issues, and session expiration. 1. Configuration error: Check and set the correct session.save_path. 2.Cookie problem: Make sure the cookie is set correctly. 3.Session expires: Adjust session.gc_maxlifetime value to extend session time.

Methods to debug session problems in PHP include: 1. Check whether the session is started correctly; 2. Verify the delivery of the session ID; 3. Check the storage and reading of session data; 4. Check the server configuration. By outputting session ID and data, viewing session file content, etc., you can effectively diagnose and solve session-related problems.

Multiple calls to session_start() will result in warning messages and possible data overwrites. 1) PHP will issue a warning, prompting that the session has been started. 2) It may cause unexpected overwriting of session data. 3) Use session_status() to check the session status to avoid repeated calls.

Configuring the session lifecycle in PHP can be achieved by setting session.gc_maxlifetime and session.cookie_lifetime. 1) session.gc_maxlifetime controls the survival time of server-side session data, 2) session.cookie_lifetime controls the life cycle of client cookies. When set to 0, the cookie expires when the browser is closed.

The main advantages of using database storage sessions include persistence, scalability, and security. 1. Persistence: Even if the server restarts, the session data can remain unchanged. 2. Scalability: Applicable to distributed systems, ensuring that session data is synchronized between multiple servers. 3. Security: The database provides encrypted storage to protect sensitive information.

Implementing custom session processing in PHP can be done by implementing the SessionHandlerInterface interface. The specific steps include: 1) Creating a class that implements SessionHandlerInterface, such as CustomSessionHandler; 2) Rewriting methods in the interface (such as open, close, read, write, destroy, gc) to define the life cycle and storage method of session data; 3) Register a custom session processor in a PHP script and start the session. This allows data to be stored in media such as MySQL and Redis to improve performance, security and scalability.

SessionID is a mechanism used in web applications to track user session status. 1. It is a randomly generated string used to maintain user's identity information during multiple interactions between the user and the server. 2. The server generates and sends it to the client through cookies or URL parameters to help identify and associate these requests in multiple requests of the user. 3. Generation usually uses random algorithms to ensure uniqueness and unpredictability. 4. In actual development, in-memory databases such as Redis can be used to store session data to improve performance and security.

Managing sessions in stateless environments such as APIs can be achieved by using JWT or cookies. 1. JWT is suitable for statelessness and scalability, but it is large in size when it comes to big data. 2.Cookies are more traditional and easy to implement, but they need to be configured with caution to ensure security.


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