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Question

Answer 1

A:

session_start() must be called before any output is sent to the browser.

Incorrect:

<html>
<?php
session_start();

Correct:

<?php
session_start();
?>
<html>

Tim Cooper 2010-09-12 19:21:08

Mike Redford 2010-09-12 19:22:28

Double check. If there are any spaces before your `<?php` tag, there will be errors.

Tim Cooper 2010-09-12 19:23:03

Dear Tom you can see my source code, it's correct.

Mike Redford 2010-09-12 19:29:44

@Mike then you may have a BOM issue (see the accepted answer to [this question](http://stackoverflow.com/questions/3557381/warning-cannot-modify-header-information-headers-already-sent)). This answer is correct and does not deserve a downvote.

Pekka 2010-09-12 19:38:22

Answer 2

+3 A:

You should check the invisible characters in source code - especially UTF BOM characted that can mess all the things. What editor are you using?

Tomasz Kowalczyk 2010-09-12 19:27:17

the PhpStorm it's a jetbrain's product.

Mike Redford 2010-09-12 19:30:37

I haven;t found anything about it but search in menu, saving, editing or so settings and you'll certailny find option to turn it off.

Tomasz Kowalczyk 2010-09-12 19:34:05

Answer 3

A:

Use Notepad++ to switch file encoding to Utf-8 without BOM, or use a HEX editor to see and remove every hidden characters at the beginning of the file. See if that helps.

SinistraD 2010-09-12 20:07:34

Answer 4

A:

I tested this locally and it works fine. Your problem is probably in constants.php or includes.php or something included by one of them. I would try printing ob_get_contents on the first line. If you see whats being printing maybe it'll help find it.

In the past I've used @ob_clean(); because my coworkers had a tendency to leave extra newlines at the end of the files (after the closing ?>). You could also try adding that to your first line.

mqsoh 2010-09-12 20:34:00

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Help about "session_start()" please ???

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