Session doesn't start in a specific page

Question

Edit: I fixed it, the problem was the spaces before <?php. Thanks for the comments.

Sessions are working on all pages except index.php

The error: session_start(): Cannot start session when headers already sent in /home/site/public_html/connection.php on line 13

connection.php:

<?php

try {
$db=new PDO('mysql:host=localhost;dbname=testdb','testuser','123456');
$db->exec("SET CHARACTER SET utf8"); }
catch(PDOExpception $e) {
echo $e->getMessage(); }

ob_start(); session_start(); # (line 13)

?>

index.php:

<?php
include 'connection.php'; include 'seo.php';
$connect_site=$db->prepare("SELECT * FROM site WHERE id=?");
$connect_site->execute(array(1));
$site=$connect_site->fetch(PDO::FETCH_ASSOC);
?>

<!DOCTYPE HTML>
<html>
<head>
...

Possible duplicate of https://stackoverflow.com/questions/8028957/how-to-fix-headers-already-sent-error-in-php — 04FS, Jun 04 '19 at 11:44
The error message talks about line 13 in connection.php, but what you have shown us does not even appear to have 13 lines - unless you have trailing whitespace/newlines _after_ the `?>`. Remove that `?>`, it is not necessary at the very end of a script file - and that it frequently causes errors like this, which is why most coding guidelines recommend that anyway. — 04FS, Jun 04 '19 at 11:48
If you moved it, you should have gotten at least a slightly different error message. — Jonnix, Jun 04 '19 at 11:50
Why are you trying to pick up the session only after making the database connection to begin with? If _that_ throws an exception and you output it in this place, ob_start afterwards will be to late anyway, in that case session_start will always fail here. — 04FS, Jun 04 '19 at 11:56
You can also try and use `headers_sent` to figure out where the headers got sent. — 04FS, Jun 04 '19 at 11:57

score 0 · Accepted Answer · answered Jun 04 '19 at 11:56

0

You have to put always the

session_start();

At the start of all your codes. Nothing had to go before whatever it is :)

Enjoy coding !

answered Jun 04 '19 at 11:56

SuRo

38
11

It's already at the top of all pages. All the pages are contains similar code structure like start of index.php But the other pages runs well, index.php doesn't. – Jun 04 '19 at 11:59
But on you're code it's not in first so try it out, when i say first it's the first line of all. – SuRo Jun 04 '19 at 12:04

score 0 · Answer 2 · answered Jun 04 '19 at 12:03

0

Change your code in connection.php

<?php ob_start(); session_start();  ?>
<?php
    try {
      $db=new PDO('mysql:host=localhost;dbname=testdb','testuser','123456');
      $db->exec("SET CHARACTER SET utf8"); }
    catch(PDOExpception $e) {
      echo $e->getMessage(); 
    }
?>

answered Jun 04 '19 at 12:03

Alok Mali

2,821
2
16
32

Thank you dude, the problem was the spaces before ` – Jun 04 '19 at 12:06

Session doesn't start in a specific page

2 Answers2