delete session variable in php

Question

i create a webpage in that i use session variables , when i click logout i clear the session variables using ajax , it working fine in IE , But when i use firefox sometimes the session is not destroyed , the code i used to clear session is [when i click logout button]

function floadhomepage(){

    ajaxFunction();
//alert('Logout clicked');
window.location.replace("index.php");

}

function ajaxFunction()
var xmlhttp;
if (window.XMLHttpRequest){
  // code for IE7+, Firefox, Chrome, Opera, Safari
  xmlhttp=new XMLHttpRequest();
   }


else if (window.ActiveXObject){
// code for IE6, IE5
  xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
}

else {

  alert("Your browser does not support XMLHTTP!");
}
xmlhttp.onreadystatechange=function(){
}
xmlhttp.open("GET","logout.php",true);
xmlhttp.send(null);
}

in logout.php file contain the folowing code

<?php
session_start();
session_destroy();
unset($_Session['session variable name']);
?>

Please guide me to find the solution Thanks in advance..

Shoban · Accepted Answer · 2009-06-01 06:45:29Z

3

Try

session_start();
$_SESSION = array();
session_destroy();

answered Jun 1, 2009 at 6:45

Shoban

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1 Comment

Shoban Over a year ago

Tell us what happens. You logoff. Then how do you the session values are not destryed?

Ozzy · Accepted Answer · 2009-06-01 14:44:39Z

0

Have you ever thought about browser caching? Even if you log out in firefox, firefox may still cache the logged in page.

try stopping page cache using something like this:

header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past

answered Jun 1, 2009 at 14:44

Ozzy

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Comments

René Höhle · Accepted Answer · 2012-11-14 08:53:33Z

0

session_destroy() alone is enough and is browser independent, as it happens on the server side.

edited Nov 14, 2012 at 8:53

René Höhle

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answered Jun 1, 2009 at 6:47

Edd Barrett

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1 Comment

Sakthivel Over a year ago

ok , But still now the session variable is there when i use firefox . what can i do to destroy that session varable ?

Bindiya Patoliya · Accepted Answer · 2014-12-01 06:29:05Z

0

I had some sort of problem when

$_Session['session variable name'] was an array( 'first_element' => true, 'second_element' => '123456789' ).

When I did

unset( $_Session['session variable name'] )

then

session_destroy, and session_start and redefined $_Session['session variable name'] = array( 'first_element' => true );

When I was var_dumping $_Session['session variable name'],

was array( 'first_element' => true, 'second_element' => '123456789' ) with second_element!

I had to unset all elements in array.

This problem dissapeared when I upgraded php. Now I can't remember which php version I had.

edited Dec 1, 2014 at 6:29

Bindiya Patoliya

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answered Jun 1, 2009 at 9:38

fornve

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