Output: The execution of session.php file you can see that there is a different session ID it means the previous session has been destroyed and all variables and cookies also destroyed. Please feel free to post any easier way to destroy a particular session. If a globalized variable is unset() inside of a function, only the local variable is destroyed. session_destroy(); If you want to clear or free up the space occupied by session variables for other use, the following PHP function is used. If you want to destroy a single session variable then you can use unset() function to unset a session variable. Starting a PHP Session. link brightness_4 code Because it's quite useful for functionality of force an user offline. In the previous section, we discussed the unset function, which is used if you want to delete specific session variables. edit close. A PHP session can be destroyed by session_destroy() function. Syntax of destroying specific session variables Though PHP automatically destroys a session after the timeout or a user has left the website. session_destroy does not change any of the variables in your script execution, it removes the session data from the server. The behavior of unset() inside of a function can vary depending on what type of variable you are attempting to destroy.. On the other hand, if you want to delete all session-related data at once, you can use the session_destroy function. The difference between both session_unset and session_destroy is as follows: session_unset just clears out the session for usage. Since all variables destroyed so PHP go to else condition output ‘session is destroyed’. The variable in the calling environment will retain the same value as before unset() was called. To begin a new session, simply call the PHP session_start() function. The Famous session_destroy – Remove Sessions From Disk. unset() destroys the specified variables. By "destroy a specific session" you mean "destroy one session variable"? The PHP code in the example below simply starts a new session. It does not unset any of the global variables associated with the session, or unset the session cookie. Before you can store any information in session variables, you must first start up the session. If you want to destroy all the session variables, then use the following PHP function. 1. http://www.php.net/manual/en/ref.session.php There is an example in the online docs. It will create a new session and generate a unique session ID for the user. session_unset just remove all session variables. The session_destroy function deletes everything that’s stored in the current session. Destroying a PHP Session. You have visited this page 1in this session. This function does not need any argument and a single call can destroy all the session variables. It took me a while to figure out how to destroy a particular session in php. From php.net: session_destroy() destroys all of the data associated with the current session. Note: If it’s desired to kill the session, also delete the session cookie. You may need to destroy specific variables, which purpose has been accomplished or destroy a session completely in an explicit way. play_arrow. How to destroy a Session. Note I'm not sure if solution provided below is perfect but it seems work for me. Note that by using session_unset, the variable still exists. This tutorial I will help you to easily selected user data from MySQL database using session variable in PHP in where clause.I will give the many examples and steps in this tutorial and follow the examples.. First connect the database in your web page and then start the session, that’s like session_start().Now select data from database using this code $_SESSION[‘user_id’]. session_unset(); Program 2: filter_none. The session is still on the users computer. 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