PHP :: Auto Session

Session_start
I have written many php scripts that use sessions. All of my scripts work great. Today i came to work to find that all my scripts were throwing stupid permission denied errors. Nothing was changed on the server, as i am the only one who has control of the server. Specifically, session_start is giving me a lot of errors. Code:

Session_start()
just to get this out of the way first... I am >NOT< outputting
anything BEFORE my call to session_start(). The error I am getting is
NOT related to the session header having already been sent.

I am running on LAMP, and my code works in ALL cases but one... if I
pass it a value of category_id=259, then the call to session_start()
bombs and I get an empty page. This doesn't happen for ANY other
category_id. I am at a complete loss here.

Session_start()
I get this error message: A session had already been started - ignoring
session_start().

How can I check to see if a session was started already?

Session_start()
I found a wonderful Captcha script and it works wonderfully, except when i use include to put it into another file...
I get this error message:

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/user/public_html/index.php:12) in /home/user/public_html/securimage.php on line 386
After some short research here it appears that this happens because there is already HTML output in the main page..

I am using the include function to add it (the form) to the regular index.php page.... Do I need to add something in the headers to prevent this? Code:

Session_start()
is it ok if the session_start() is run for multiple times. if run in multiple times what will happen?

Session_start()
I'm writing an application that has an over-abundance of AJAX. I have a central script that the user interacts with, and several scripts are called via AJAX request to do various things. It seems however, that multiple scripts running at the same time cannot execute session_start(). Like, If I have one script that is running on the server, that is using sessions, and then kick off another script, the second one will not proceed until the first one is finished.

I need them to run simultaneously. It appears that session_start puts some sort of mutex on the session file on the server, and locks it from multiple access. That makes sense. Am I interpreting the problem correctly and is their a way around it. I don't want to have to use plain old cookies.

Session_start() Never Returns
I call session_start() for almost every page on my site. After I add a lot of data to a registered session variable session_start() does no return control to the script when it is called.

How much data can you store in a session variable? PHP.exe uses 0% of the cpu while the browser just hangs and waits. Have pinpointed the script hanging at session_start() using echo and die.

Application/vnd.fdf And Session_start()
Trying to generate a simple PDF file using header ("Content-Type: application/vnd.fdf");. It works fine on it's own, but if we have session_start() at the top of the file, it doesn't come up. What gives?

It tries to open the window, just flashes and the PDF never shows. But without session_start, the same code generates the PDF just fine.

Session_start Issue
I'm running into an issue with session_start(). I see that you can't
run it twice, otherwise it causes an issue. That's fine, and makes
sense. I also saw some ideas on how to get around this if you need to
run it more than once, and I get those as well, but none are working
for me.
Here's a mockup of what I have:

index.php
info.php
lib/common.php
lib/output.php

index.php
<?php
require_once('lib/common.php');
require_once('lib/output.php');

sessionStart();

runout();
?>

info.php
<?php
require_once('lib/common.php');
require_once('lib/output.php');

sessionStart();

output("Hello World");

outputStop();
?>

lib/common.php
<?php
ob_start();

function startSession()
{
if(!isset($_SESSION))
{
session_start();
}
}

?>

Re:session_start() Error
However I still can't figure out the problem....

I keep getting the same error...

Here is what I am doing...

I have some structured code... include files....
I am trying to create a user login where each page knows the user is
or isnt logged in....
However whenever I refrence the file with this code (always included
at the beginning of the file)...

session_start();

function loggedIn()
{
return isset($_SESSION['authorized']);
}

It throws that error....
Should I only use session_start() once when the user enters the main
page?
It seems that the first page to start the session is fine and
continues to be fine evening when going to it from a page with the
error....

Session_start() Problems
the problem is that $_SESSION is nothing on a page even after i call session_start(). ive tried printing it, and foreaching. nothing. however on another included page it works. wtf? PHP Code:

Session_start Problem...
I'm stuck.
I have just compiled and installed the latest and the greatest
versions of Apache (2.0.48), PHP (4.3.3) and MySQL (4.0.15) on a Redhat 9 box.
The web and MySQL server runs fine, but I have problem with PHP. I have a small
php testapplication taken from a MySQL book that accesses a small database.
When I point my browser to the php script, I get the following error :

"Fatal error. session_start(). Failed to initialize storage module in
'my script' line 29. Line 29 in the script calls session_start.

I have a phpinfo script in my documentroot on the webserver and if I run it
everything looks hunky dory.

I have followed every instruction I could find on the php-website on how to
install php with apache V2, read all the manuals I have, but I can't figure
this out.

Warning: Session_start():
I have problem and I tried to solve it multiple times but it is still. this warning message , any program use session doesn't run without this message:

Warning: session_start(): open(/tmpsess_c9ae4e020baf5f144f8bdbb6ad45a54e, O_RDWR) failed: No such file or directory (2) in C:apachehtdocs4imagesincludessessions.php on line 84

my operating system is Windows XP, I use Php Tried I updated php.ini to point to tmp folderC:apachephpmp and I made folder write/read by check out read-only check box , also I made folder sharing through the network and and it is enable to network user.

Problem With Session_start
I get a warning and cannot start a session. I understand from reading
through the documentation and other posts that session_start must occur in
the php script before any HTML tags or output to the browser. In my
script, the session_name and session_start are the first two lines in
thescript; so I can't see what the problem could be.

I have used sessions on other pages in a similar fashion (in the same web
project, on the same server) and do not have any problems.

The warning as reported by the web server is as follows:
----------
Warning: Cannot send session cookie - headers already sent by (output
started at /home/parking2/secure_html/ControlPanel/adminCtrl.php:2) in
/home/parking2/secure_html/ControlPanel/adminCtrl.php on line 4

Warning: Cannot send session cache limiter - headers already sent (output
started at /home/parking2/secure_html/ControlPanel/adminCtrl.php:2) in
/home/parking2/secure_html/ControlPanel/adminCtrl.php on line 4
-----------

// The first lines of my php script source code are as follows:

<?php
session_name("report_page");
session_start();

include '../vars.php'

// Get variables from forms:
if (!empty($HTTP_POST_VARS)) while(list($name, $value) =
each($HTTP_POST_VARS)) $$name = $value;

show_page_header();

if ($logout)
{
$_SESSION['time'] = 0;
}

if(!($_SESSION['time'] > (time() - 3600) ))
{
do_login();
exit;
}

// end php code snippet ------------------------------------------

Session_start Doesn't Allocate A New Id?
I'm having a funny problem. More than likely it's something simple
that I'm just not seeing, but ...I'm not seeing it!

I'm storing session data in a table, following the model in Lerdorf &
Tatroe. Everything seems to work fine until I (as 'the user') log
out.

The logout process purges the record from the sessions table and
deletes the session-id cookie. This works fine. I check afterward
and they are gone.

But the next time I come back in, though, I have a problem.
session_start() apparently doesn't allocate a new session id. The
new session record has a blank in the id field, and the session cookie
is allocated but id-less.

So either I don't really understand how session_start works, or I'm
inadvertently getting it confused, or....

Setcookie And Session_start
I can't do setcookie after seesion_start.
I been hours on this now and can't figure it out.

In CODE words
==============================
// This works:
setcookie("test", "test", time()+3600);
session_start();

==============================
// This does NOT work:
session_start();
setcookie("test", "test", time()+3600);

WHY?

Session_start() Problem
This is a familiar question here, but the answers I
found in this and other groups did not help. I get the :

Warning: Cannot send session cache limiter - headers already sent
(...)

error, even though my session_start arguments are the first arguments
on the page after <html>. ANyone know how to fix this ?

Session_start And Session_register
is that OK if I declare the same variable in the same file several
times? For example somewhere in the beginning of a file I have
session_register("cat") and than, somewhere in the middle of the file,
I have again session_register("cat"). Can the second declaration
destroy the value of the variable cat?...

Session_start Function
I designed my site in a way that the template is loaded from a php file that included in every page of my site. Now I want to know if I put SESSION_START() function in this template file so I can access the session variables in every page, when every page is accessed from theme.php a new sesion_start will be generated.

So, this session starts in every page , will this cause session variables in last page to be deleted? and If your answer is YES, what you suggest instead of putting session start in main template code.

Muliple Session_Start()
I have some questions (for php 5.2.3)

1) Is there any problem if I use Session_Start() several times in a page?

2) Is there any other variables responsible for session expire except than session_destroy() and session_gc_maxlifetime() ?

Script Gets Stuck On Session_start(); -why?
How do I get ...
session_start();
... to work again?

When the execution comes to that line, the browser/server gets stuck and just thinks, thinks, thinks ... and then it doesn’t go on with the script. Anyone else had this problem?

I am not outputting any html before the ...
session_start();
... so that’s not the problem. In fact it’s on the second line, after only the “<?php” of the first line.

It has worked before. Previously I have called another file which has a ...
session_destroy();
... a couple of lines down, and I am wondering if my current problem has to do with me no longer destroying the session.

I am very confused, and I am thinking of many unprobable solutions.
- Is there a session that shouldn’t be there, and could I then somehow destroy it? (session_destroy will give an error saying session isn’t started so it’s got to be something else)
- Can I fix it by setting some timeout setting?
- Is there too much garbage piling up somewhere, and can I do something about it?

At some occasion I got an error message through the browser, saying the memory (allegedly about 8 MB) was used up. My scripts run in a hosted environment so I don’t know if it was a temporary overload on the server, or if it’s me who has used up a given share of my own. (My host does not provide help on php, so ...)

Session_start Is Slow Occasionally
I have a site that is relatively high loaded (~200000 reloads/sec) and i am trying to optimize it.

So i have started timing sections of the php scripts to find out which is the slowest so i optimize it first. I write the times to a database( timings are done on the live server). So now when a user reloads the page (timings are set on only one of the pages) i write to the database how long it took and how long different sections take. That way i noticed thar occasionally that page takes extremely long to generate (there are occasions of > 300sec), but generally it takes between 0.05 and 0.2 sec to generate. I started moving the sections to determine where the problem lies and it turned out that these three lines take that long from time to time:...

Session.auto_start Or Session_start()
I'd like to keep security in mind with my application, should I use auto_start configuration or is it better to handle sessions myself. I'd also like to know how to tell how many people are in the application at any given time.

Session_start(); Time-out + Security OK?
I'm a webmaster of an online game. I base all the users login on the php session... My main problem:

After like 1 hour of innactivity, the session expire and the played logged in is disconnected. I would like to raise the time-out to .. let say 3 hours ...

Is it possible? How?

-------------------------------
a)Many people create their own session, why? is the php session are "unsecure"?

b) Is it possible to "change" the value of a session variable .. I mean, is an hacker can change let say:

$_session["user"] = "wrong user";
to
$_session["user"] = "good user";

(that could be $_session["accesslevel"] or anything else..)

Because the way my login work is a little bit like this:

-User enter login info;
-Login info checked with the DB;
-If user/pass match, then:
$_session["user"] = $_post["user"];
else
$_session["user"] = "";

on the page security, I do this kind of check:
if (!isset($_SESSION["user"]) ¦¦ (isset($_SESSION["user"]) && $_SESSION["user"] == "") {
die("<script>location='login.php'</script>";
}

Is this way is secure?

Session_start() Works Wrong For Me
I have problem with sessions. I make this without cookies but by
propagate session ID by GET.

I have make session by calling session_start() after test login and
password with database. After that i register a one session variable.

My problem is when i later call session_start(). This (second) call
make me new session (second), but not rectivate and introduce
back frozen variables of my first (correct) session to the global
namespace. I think this situation happens when URL doesn't contain
session ID. Is the reason or maybe something else?

Quick Question On Session_start()
I consider myself a reasonably strong PHP programmer, but I've not used
sessions before (I've used cookies instead) and I'd appreciate it if
someone could confirm something for me.

Namely... I'm working on someone else's code who has used sessions - In
their main login page, they do not use session_start() but instead, just
write directly to the $_SESSION super global array variable. This seems
to work - however on some later pages, he has session_start() noted at
the top of his code - I've read some of the documentation on sessions
and I believe that since I am using Apache 1.3.29 with PHP 4.3.6 that it
may not be nescessary to have the session_start().

A quote from the php.net documentation says:

"Note: As of PHP 4.3.3, calling session_start() while the session has
already been started will result in an error of level E_NOTICE. Also,
the second session start will simply be ignored."

Thus, can one start a session by simply writing to the $_SESSION super
global array and forget about every using session_start() ?

Using Session_start() And The Page Get Very Slow
when I try to use the session_start(); at top top of my page, the page loading gets very very very (!) slow. I just cant understand why. here is my code (when I dont use session_start(), its all working normal) PHP Code:

Bizarre Session_start Error
I have moved my site to a hosting environment with PHP 4. But
I get this bizarre error upon invoking session_start()

Warning: session_start():
open(/tmp/php/sessions/b/3/c/sess_b3c32ee4770b585fe49244f043b4dafa,
O_RDWR) failed: No such file or directory (2) in
/www/i/ikite/htdocs/admin/includes/functions/sessions.php on line 67

Could someone explain what this means, or what more information I
should provide?

Session_start Costed Too Long....
I used ajax.
When the first time I visit the page, it spent about less than 0.3s
but when I visit the same url second time, it cost more than 10s, I
located the session_start(); call ,what is the problem?

Js File Fails With Session_start()
i've had this problem and i've had this problem before. IE fails to accept cookies when a js file is being loaded from a tag and i think it causes similar problems with flash files loading movies too. The cookies are sent to php properly and i can access the session id form the file but as soon as i use session start it tries to extend the session cookie life i think which causes ie to die.

I've searched the php site and the net for a way to use a session id to activate a session without it sending a cookie for this one page only but i cannot. I would prefer to use the cookie session method.

Session_Start() Hangs After Setting Session_Id
I am trying to do the following in one of my pages.
session_id($_GET['SESSIONID']);
session_start();

I am running php5, however as soon as I call session_start the script
hangs and nothing happens. Is anyone else experiencing this problem, or
am I doing something incorrectly?

Session_start Causes Apache To Crash (Win32, PHP 5.1.1)
Does anyone have a problem with Apache2 crashing after executing a PHP
script with session_start()? I notice if session_start() is placed
anywhere except at the start of the file, APache will crash. Can anyone
explain to me why? I don't want session_start to be at the start of the
file because I need to override some session methods. So session_start
has to happen after the declaration of custom session methods.

Session Problem (session_start(); Is In The Right Place.)
I now run into a session problem when adding in the sessions so it can store/pass values to the next page. I know the below session code works fine as on the next page it works without a problem.

Can anyone see why this would cause the errors (i've taken out the full URL btw in the error statement):

Warning: Cannot send session cookie - headers already sent by (output started at /***URL***.php:1) in /***URL***.php on line 2

Sessions Working Without Session_start() Function
I'm having terrible problems with my session and post form heavy pages and I'm now experimenting with different ways of doing it. I removed the session_start() I had at the top of every page, so that session_register() will have to live without it. Nothing happens. It is exactly the same as before. What's the purpose of session_start()?

Warning: Session_start(): Cannot Send Session Cookie
Warning: session_start(): open(/tmpsess_526e492c7e6fbe4887e4c52821b34be7, O_RDWR) failed: No such file or directory (2) in C:Program FilesApache GroupApache2htdocsTempMgtindex.php on line 15

Warning: session_start(): Cannot send session cookie - headers already sent by (output started at C:Program FilesApache GroupApache2htdocsTempMgtindex.php:15) in C:Program FilesApache GroupApache2htdocsTempMgtindex.php on line 15

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at C:Program FilesApache GroupApache2htdocsTempMgtindex.php:15) in C:Program FilesApache GroupApache2htdocsTempMgtindex.php on line 15

Warning: Unknown(): open(/tmpsess_526e492c7e6fbe4887e4c52821b34be7, O_RDWR) failed: No such file or directory (2) in Unknown on line 0

Warning: Unknown(): Failed to write session data (files). Please verify that the current setting of session.save_path is correct (/tmp) in Unknown on line 0

Sessions Call To Undefined Function: Session_start()
PHP 4.3.4 is distributed with SuSE 9.1. Session support is supposed to be
default in PHP 4+ ... but

In a script I'm writing, my page starts with the lines

<?php
session_start();
$_SESSION['curKey'] = 0;
?>
......

When the page is loaded, I get the error message

"Fatal error: Call to undefined function: session_start()
in /srv/www/htdocs/lookups/index.php on line 2"

which corresponds to the call to session_start(). session.auto_start = 0 in
my php.ini, but an explicit call to session_start() should start the
session according to the documentation, so I don't see anything wrong.
Anybody have an idea of what I'm missing?

Warning: Session_start(): Cannot Send Session Cookie
Warning: session_start(): Cannot send session cookie - headers already sent by (output started at /home/www/alisworld.50free.org/index.php:13) in /home/www/alisworld.50free.org/register.inc on line 2

Ajax Request And Session_start() Stops The Refresh
When i execute an very simple Ajax request to an PHP script wich just print one line and i put an sleep(20) infront of it, it works perfectly when i refresh the page. BUT..
When i put session_start() at the top, i can't refresh the page anymore. It won't refresh untill the server responed. When i remove the session_start(), i can refresh anytime i want.

Session_start(): Failed To Initialize Storage Module
I am studying samples of a book to save session handler to a table in
Oracle. But I got error after setting "session.save_handler=user":

Fatal error: session_start(): Failed to initialize storage module. in
c:phpcodewroxcode_downloadsch08handler.php on line 9

What could cause the problem? Is there a good sample in saving session
handler into Oracle (not MySQL)?

I use PHP 4.3.3 with Apache.

Warning: Session_start(): Cannot Send Session Cookie
This is my code:
<?php
session_start();
session_register("korisnik", "sid");
$korisnik = $username;
$sid = session_id();
?>

wherever I put this code on my page i get the following errors:

Warning: session_start(): Cannot send session cookie - headers already
sent by (output started at /xy/unos_reg.php:3) in /xy/unos_reg.php on line 4

Warning: session_start(): Cannot send session cache limiter - headers
already sent (output started at /xy/unos_reg.php:3) in /xy/unos_reg.php
on line 4

Warning: Session_start() [function.session-start]....
I'm trying to get a login script working and I'm getting these errors

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /home/nathan/public_html/header.php:10) in /home/nathan/public_html/include/session.php on line 46

Session_start() Ruining Search Engine Indexing
Google is trying to index my pages with session id's attached to them.

Ex. = show_cat.php?catid=P70&PHPSESSID=aeg3klbcaeoirjerfodfifs

And I don't know if this is right but I put these to lines in my robots.txt but it still didn't work.
Disallow: /*?PHPSESSID=
Disallow: /*?*PHPSESSID=
I am using session_start();

at the beginning of all my pages. What do I need to do? I will be toast if I don't change something.

Warning: Session_start(): Read Returned Less Bytes Than Requested
I had installed php 4.3.7 on my system and test some php code.
But there is a serious problem. On my system(using apache2) the code,

<?php
session_start();
?>

gets some warning,

Warning: session_start(): read returned less bytes than requested in
/home/http/index.html on line 2

Session_start(): Cannot Send Session Cache Limiter - Headers Already Sent
I'm getting this warning:

[15-May-2006 18:11:35] PHP Warning: session_start(): Cannot send
session cache limiter - headers already sent in
/home/httpd/vhosts/monkeyclaus.org/httpdocs/media/audio/pdsIncludes/CommandStartSession.php
on line 14

line 14 is this:

session_start();

why is that creating a warning?

Fatal Error: Call To Undefined Function: Session_start()
Below is the simple code of session start :

<?php
session_start();
echo "session_start() works!";?>

but when i run this script the browser gives me this error :

Fatal error: Call to undefined function: session_start() in /var/www/html/session.php on line 2

This script was running fine and also my other scripts in older php 4.1.2, but when i upgraded to 4.2.1 the the problem started. Is it because of the old php.ini file not been overwritten or it is something else. Register Globals is off.

Problem With Session_start() - Cannot Send Session Cookie/cache Limiter
Hi, i am getting the following errors when running my php script:

Warning: Cannot send session cookie - headers already sent by (output
started at

c:apacheapache2htdocs hegainindex.php:4) in
c:apacheapache2htdocs hegainindex.php on line 19

Warning: Cannot send session cache limiter - headers already sent
(output started at

c:apacheapache2htdocs hegainindex.php:4) in
c:apacheapache2htdocs hegainindex.php on line 19

....the script i am trying to run is as follows:

<?php

session_start(); //start session to get session variables

//this code is to check if a custom session variable exists. if none,
create one.
if (!isset($custom_sessid)) {

$custom_sessid = md5($_SERVER['REMOTE_ADDR'] . " " . date("Y-m-d
H:i:s")); // create a session id
session_register("custom_sessid"); // register newly ceated session
variable

}

$indate = date("Y-m-d H:i:s");
$page_id = 1; //each page will have its own number

$insert = "INSERT INTO tracker (tracker_id, page_id, indate,
custom_sessid) values (null, $page_id,

'$indate', '$custom_sessid')";
$result = mysql_query($insert);....

Fatal Error: Session_start(): Failed To Initialize Storage Module.
Occasionally, I get the following error when running a PHP script:

Fatal error: session_start(): Failed to initialize storage module. in /home/rivka/public_html/header.php on line 3

Line 3 is just a simple session_start(); command. Anyone seen this problem before? Any guesses on what is causing it and how to fix it?

Auto Session_start();

Is there a way without code <?php session_start();?> ontop of each page to get that affect?