PHP Unset Session Variable

Question

I m a noob programmer so I apologies in advance for any obvious mistakes  I ve spent the past week creating a product database kinda thing  I ve got too the point where I can add products using a form  view all products added etc  I ve being using sessions which are created via the form input data  I m struggling to include get a delete product page working  I ve tried using unset to clear the variable but can t get it too work    ADD Product page which sets the session variable      SESSION  Products         POST    is how i set the session on the add products page    unset   SESSION  Products        is how i have tried to clear the session although it does not work    Any point in the right direction will be appreciated

User · Answer

Destroying a PHP Session  A PHP session can be destroyed by session destroy   function  This function does not need any argument and a single call can destroy all the session variables  If you want to destroy a single session variable then you can use unset   function to unset a session variable   Here is the example to unset a single variable    lt  php    unset   SESSION  counter       gt    Here is the call which will destroy all the session variables    lt  php    session destroy      gt

User · Answer

unset is a function  not an operator  Use it like unset   SESSION  key     to unset that session key  You can  however  use session destroy    as well   Make sure to start the session with session start    as well

User · Answer

I am including this answer in case someone comes to this page for the same reason I did  I just wasted an embarrassing amount of time trying to track the problem down  I was calling   unset   SESSION  myVar       from a logout script  Then navigating to a page that required login  and the server still thought I was logged in  The problem was that the logout script was not calling   session start      Unsetting a session var DOES NOT WORK unless you start the session first

User · Answer

Unset is a function  Therefore you have to submit which variable has to be destroyed    unset  var     In your case   unset    SESSION  products       If you need to reset whole session variable just call  session destroy

User · Answer

If you completely want to clear the session you can use this   session unset    session destroy      Actually both are not neccessary but it does not hurt   If you want to clear only a specific part I think you need this   unset   SESSION  Products       or   SESSION  Products           depending on what you need

User · Answer

You can unset session variable using   session unset - Frees all session variables  It is equal to using    SESSION   array    for older deprecated code  unset   SESSION  Products     - Unset only Products index in session variable   Remember  You have to use like a function  not as you used  session destroy     Destroys all data registered to a session  To know the difference between using session unset and session destroy  read this SO answer  That helps

User · Answer

set   SESSION  test     1      destroy unset   SESSION  test

[php] PHP Unset Session Variable

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