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