How can i access session data in php?
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The code is valid, assuming that the variable Show Check to ensure that cookies are enable in your browser. Also, be sure that session_start() comes near the top of your script, it should be the first thing sent to the client each time. To test a session, create "index.php" with the following code: Reload the page several times and you should see an incrementing number. An example of passing session variables between two pages is as follows: PageOne.php PageTwo.php For simplicity put PageOne.php and PageTwo.php in the same directory. Call PageOne.php and then PageTwo.php. Try also tutorials here, here, and here. A session is a way to store information (in variables) to be used across multiple pages. Unlike a cookie, the information is not stored on the users computer. What is a PHP Session?When you work with an application, you open it, do some changes, and then you close it. This is much like a Session. The computer knows who you are. It knows when you start the application and when you end. But on the internet there is one problem: the web server does not know who you are or what you do, because the HTTP address doesn't maintain state. Session variables solve this problem by storing user information to be used across multiple pages (e.g. username, favorite color, etc). By default, session variables last until the user closes the browser. So; Session variables hold information about one single user, and are available to all pages in one application. Tip: If you need a permanent storage, you may want to store the data in a database. Start a PHP SessionA session is started with the Session variables are set with the PHP global variable: $_SESSION. Now, let's create a new page called "demo_session1.php". In this page, we start a new PHP session and set some session variables: Example// Start the session // Set session variables Run example » Note: The Get PHP Session Variable ValuesNext, we create another page called "demo_session2.php". From this page, we will access the session information we set on the first page ("demo_session1.php"). Notice that session variables are not passed individually to each new page, instead they are retrieved from the session we open at the beginning of each page ( Also notice that all session variable values are stored in the global $_SESSION variable: Examplesession_start(); // Echo session variables that were set on previous page Run example » Another way to show all the session variable values for a user session is to run the following code: Examplesession_start(); print_r($_SESSION); Run example » How does it work? How does it know it's me? Most sessions set a user-key on the user's computer that looks something like this: 765487cf34ert8dede5a562e4f3a7e12. Then, when a session is opened on another page, it scans the computer for a user-key. If there is a match, it accesses that session, if not, it starts a new session. Modify a PHP Session VariableTo change a session variable, just overwrite it: Examplesession_start(); // to change a session variable, just overwrite it Run example » Destroy a PHP SessionTo remove all global session variables and destroy the session, use Examplesession_start(); // remove all session variables // destroy the session Run example » PHP ExercisesHow can I access session in PHP?If you want to get a session id, you can use the session_id function, as shown in the following snippet. session_start(); echo session_id();
How do I access session data?To access the session data we set on our previous example from any other page on the same web domain — simply recreate the session by calling session_start() and then pass the corresponding key to the $_SESSION associative array.
How can I see session variables in PHP?You can check whether a variable has been set in a user's session using the function isset(), as you would a normal variable. Because the $_SESSION superglobal is only initialised once session_start() has been called, you need to call session_start() before using isset() on a session variable.
How can I access session variable from another page in PHP?session_start(); In the start of every page, or any PHP file that needs to have access to the session. The easiest way to do this, is have something like a header. php file and include/require this at the top of every page of your site or common pages.
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