header('location:index.php') redirects me to index.php after refreshing the page for 2 times

Question

I have a php page (index.php) in which after verifying the username and password a session will be set($_SESSION['expire']) that will be expired and unset after 30 mins (30 mins after pressing the login button) and will redirect us to index.php again:

header('location:index.php');

After verifying, a menu will be shown in index page that one of its item is ContentManager.php. As shown below by clicking this item we will connected to the db and will enter contentmanager.php

switch($_REQUEST['action'])
{
case 'ContentManager' : 
include('model/content.php');
$contents = getContent($conn);
include('view/contentmanager.php');
break;
}

in the ContentManger.php I have:

<?php
//if the session is not unset and expired yet
    if ( isset($_SESSION['expire']) && ($now<= $_SESSION['expire']))
{   
?>
do sth...

<?php
}
else
{
//unset the session and redirect to index.php again
unset($_SESSION['expire']);
session_destroy(); 
header('location:../index.php');}
?>

This works fine, but the problem is that after passing 30 mintues I have to press "ContentManager" 2 times to redirect to index.php If I just press it one time a blank page with be shown. But by refreshing the page for second time it will redirect to login page (index.php) again.

Please help me...

And what is `expire` set to? Wouldn't this very check you wrote explain the 30 minutes? — mario, Feb 09 '13 at 17:04

score 1 · Answer 1 · answered Jul 09 '15 at 22:37

check your spacing before header include .it may cause error while redirecting.and another solution is check your output buffering is you output buffering set to off or on. To check this got to your servers php.ini file and check output buffering .If its off then set it on and if you don't have excess to edit php.ini file you may also on this typing the following code <?php ob_start();?> you must write this code for each page and to off output buffering type <?php ob_end_flush();?>

score 0 · Answer 2 · answered Feb 09 '13 at 16:47

0

Its because youre outputting text (probably a blank line) before the header. In the example you posted it will output a the blank line between the ?> and the

answered Feb 09 '13 at 16:47

Eric

2,056
13
11

I removed all the blank lines but it didn't help. – Az Dr Feb 09 '13 at 16:51

score -1 · Answer 3 · edited Sep 29 '19 at 14:59

-1

I think this will resolve:

<?php
//if the session is not unset and expired yet
    if ( isset($_SESSION['expire']) && ($now<= $_SESSION['expire'])):
?>
do sth...

<?php
else {
//unset the session and redirect to index.php again
unset($_SESSION['expire']);
session_destroy(); 
header('location:../index.php');}

endif
?>

edited Sep 29 '19 at 14:59

Martijn Pieters

1,048,767
296
4,058
3,343

answered Jul 14 '15 at 13:52

Alynva

499
7
10

header('location:index.php') redirects me to index.php after refreshing the page for 2 times

3 Answers3