Related to session_start() start on login but not work on other page

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I am new user for PHP.I have working on some php project.want some help regarding session in php.I have login.html page which form action perform to login.js. when login perform,the Username and password has requsted url to login.php page for check username & password in mysql db table and start session_start() and set $_SESSION to username and password. If true then relocated on home.php page. but my home.php page content html code with this php code I have start session on login.php its started.I have check it by print_r($_SESSION) but when it locate on home.php it direct locate on logout.php. and it shows me error that [client] PHP Warning: session_destroy(): Trying to destroy uninitialized session in logout.php........

my logout page contain html code with this php code and relocate to login.html page.

You have to start the session before using it.


session_start - Manual, When session_start() is called or when a session auto starts, PHP will call the open in a special serialized format) and will be unserialized and used to automatically If a user uses ob_gzhandler or similar with ob_start(), the function order is Then try to call the variable from a different page, it will not find it because of� How to Fix: Warning: session_start() [function.session-start]: Cannot send session cache limiter We recently came across this pesky problem and found these two articles very helpful. Don’t save your UTF-8 files with BOM as it creates issues.

On every page where you want to access session variable you need to add on top of the page session_start();

PHP Login with Sessions and MySQL: the Complete Tutorial, Login with MySQL and Sessions, account registration, password security and more. Open your favourite code editor, create an empty PHP script an save it as “myApp.php” inside a This is easily done with the session_start() function. Many different errors can occur (a username is not valid, a database query failed …)� Re: Session_start doesn’t appear to be firing Aug 13, 2015 06:57 AM | mgebhard | LINK Session is a global ASP framework and part of the application life cycle not the page life cycle.

Check this related answer in the link below Session Start And Destroy

This is just the same as what is in the link above.

All you have to do is create a session for the login. So here is the trick. Each time you move from index to home, you shoulkd check if the login session exists. If not, ask the user to login.

Check if a user is logged in


    if (!(isset($_SESSION['login']) && $_SESSION['login'] != '')) {

        header ("Location: login.php");

Again, we first start a PHP session. The IF Statement that comes next is quite complex. But we're testing for two things: has a user session called login been set? And is this session a blank string?

!(isset($_SESSION['login']) && $_SESSION['login'] != '')

The first part is this:


To check if a session is set you can use the inbuilt function isset. We're using the NOT operator before it. (The NOT operator is an exclamation mark.) So we're saying, "IF the session is NOT set". The session might be set, but may have a "1" in it. We also need to check if the session called login is a NOT blank string. If both of these things fail then we can redirect to the login.php page, as it means that the user is not logged in.

For every page in your site, if you have the above script at the top of your page, it will redirect a user if they are not logged in. That way, you can protect your pages from non-members. If they are logged in, they will be able to view the page.

Logging out If you have a look at the code for logout.php you'll see the following:


This is all you need to log a user out: you start a session, and then issue the session_destroy command. All you need is a link to this page from anywhere on your site. The link would be something like this as your HTML:

<A HREF = logout.php>Log Out</A>

When the user clicks this link, they will be taken to the page with the code that destroys the session.

I hope this helps.

session_start, When session_start() is called or when a session auto starts, PHP will call the After viewing page1.php , the second page page2.php will magically contain the session data. from here every other script can be run (and makes it seem like multitasking) Next, what most people do NOT do is delete the session cookie! Upon calling session_start() the "first time", when the session does not already exist, php will spawn a new session but will not call the write handler until script execution finishes. Thus, the session at this point exists in the server process memory, but won't be visible as a row in the DB before the script ends.

PHP Sessions, A session is started with the session_start() function. Session variables are set with In this page, we start a new PHP session and set some session variables: � session_start(); $_SESSION['CoolTune'] = 'SesameStreetSong'; the next page in the same site can now open/read/access the valiable stored in the session - of that flow/site - as any other page is not part of that particular session, the variables in the session are not accessible.

How to Create, Access and Destroy Sessions in PHP, all the cookie data for a website is automatically sent to the server within the request. To begin a new session, simply call the PHP session_start() function. variables and if doesn't, it starts a new session by creating a new session ID. example from any other page on the same web domain — simply recreate the� The session_start method call once when a session started. So in session_start you did not get session status null because the previous session was ended & a new session just created. For example if you need to redirect a user to login page after session empty then you can write redirect URL in this session_start method.

session_start() not working in my web site ?, I have build my custom coded website with php and mysql but when i want to the function "session_start()" not working log file; Next Exception: Cannot open source device in /barzan/login.php:2 it is not working; https://greengasenergies. com/barzan/login.php; other page without session is working . yes i know # Session_Start: Fired when a new user visits the application Website. But here my problem is first time it is working fine, after one hour if i click on pages in my application the session start event firing for each page request instead of firing only one time.So that my code is executing on each page request of same user

  • So why do you want to destroy it?