Session variable not being stored

Question

Possible Duplicate:
“Warning: Headers already sent” in PHP

Why does this not work? I expect to see whatever is input into the text box in first.php displayed back out in test.php.

    <html>
<body>
<form action="test.php">
Test: <input type="text" name="test" />
<br> <input type="submit" name="submit" />
    <?php
    session_start();
    $_SESSION['test'] = $_POST['test'];
    ?>

</body>
</html>

Here is test.php

    <?php
    session_start();
    $check = $_SESSION['test'];
    echo $check; 
    ?>

It looks like your pointing the form to test.php before setting it on the form page. — Brutnus, Nov 06 '12 at 16:00

NullPoiиteя · Accepted Answer · 2012-11-06T16:31:34.990

2

session_start() must be called before outputing anything(even not white space) to the browser.

you are starting session after html start session on the very first line of page like

<?php
session_start();
print_r($_SESSION);
if(isset($_POST['submit'])){
    $_SESSION['test'] = $_POST['test'];
}
?>
<html>
    <body>
        <form method="post" action="addimageprocess.php">
            Test: <input type="text" name="test" />
            <br>
            <input type="submit" name="submit" />
        </form>
    </body>
</html>

edited Nov 06 '12 at 16:31

answered Nov 06 '12 at 16:00

NullPoiиteя

56,591
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Thanks. This makes sense, and I've made the modifications you've suggested however it's still not working. – user1613223 Nov 06 '12 at 16:12
@user1613223 if you have any further query or getting error regarding my answer than let me know ill solve – NullPoiиteя Nov 06 '12 at 16:23
I added the extra pieces in (and changed form action to "form method" as I believe you had a typo there. Test.php echos a blank page still. – user1613223 Nov 06 '12 at 16:26
what are you getting in print_r($_SESSION) – NullPoiиteя Nov 06 '12 at 16:27
It looks like it has saved several inputs from a test session I was doing earlier, completely unrelated to this. They are stored in an array. – user1613223 Nov 06 '12 at 16:31
@user1613223 how stupid i am i have wrote action="post" instead of method="post" – NullPoiиteя Nov 06 '12 at 16:32
@user1613223 check this its working now – NullPoiиteя Nov 06 '12 at 16:33
Its ok, I noticed that typo and made the adjustment earlier. Still not giving an output when changing that – user1613223 Nov 06 '12 at 16:33
@user1613223 i have tried exactly i have edited in answer its working fine – NullPoiиteя Nov 06 '12 at 16:35
if you still have issues with session variables not being set u should refer down to my post about saved_path – DWolf Nov 06 '12 at 16:47

score 1 · Answer 2 · answered Nov 06 '12 at 16:00

1

session_start() should be set before any headers are sent (i.e. at the very top of the page)

answered Nov 06 '12 at 16:00

Prash

1,915
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score 0 · Answer 3 · answered Nov 06 '12 at 16:01

The PHP code is executed before the actual POST is done, because PHP is a server-side language. At that point, there is actually no $_POST array.

This code, from your eg.

 <?php
  session_start();
  $_SESSION['test'] = $_POST['test'];
 ?>

The $_POST is posted (or exists), to the test.php page.

score 0 · Answer 4 · answered Nov 06 '12 at 16:02

The PHP in your main script is not doing what you want it to do, in fact is just saving junk and or null in best of the cases. You need to inverse the PHP scripts, put

<?php
session_start();
$_SESSION['test'] = $_POST['test'];
?>

in test.php and

<?php
session_start();
$check = $_SESSION['test'];
echo $check; 
?>

in you main php

score 0 · Answer 5 · answered Nov 06 '12 at 16:32

If you are using a webserver, and you do have

<?php 
 session_start();
 $_SESSION['test'] = $_POST['test'];
?>

but it still isn't storing the session then you will need to check the saved_path

  <?php
    phpinfo():
  ?>

check under the session header to see if the session:save_path is set and make sure that it exists on the server. if its a webserver then you will have to contact your host to set up the save path for you.

Session variable not being stored

5 Answers5