Errors With PHP Session [duplicate]

This question already has answers here: How to fix "Headers already sent" error in PHP (11 answers) Closed 9 开发者_Go百科years ago.

Just wondering if there are any alternative ways to use session_start() and also having my header.php in every page without getting the below warning? Help?

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent

Here's the code.

<?php
session_start();
?>
<? include('header.php'); ?>

---

You should be calling session_start() before any output. Why can you not move the two around?

---

Make sure nothing is output when you run session_start(), it should be run once at the very start of your web page being requested.

This issue doesn't need resolving via JavaScript, you just need to restructure your code.

---

Yes, you have to use session_start() before outputing anything.

If you use session_start() before including you header.php, this should work.

---

Start your session before you include header.php