This question already has an answer here:
slightly long question. I recently moved my Dev site to a web server for further testing.. and it was working 100% perfectly before the move. Most features are working except for anything involving headers..
I've added ob_start / flush to all the places I'm using headers.. and I checked that I called session_start at beginning of all pages (unless set). Played around with lot's of
things :/ But I get 1000 errors.
Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /var/sites/p/******/public_html/index.php:3) in /var/sites/p/*******/public_html/index.php on line 4
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /var/sites/p/party******/public_html/index.php:3) in /var/sites/p/*******/public_html/index.php on line 4
Debug active
And my index.php (I've tried every way) =
<!DOCTYPE html>
<html lang="en">
<?php if (!isset($_SESSION)) {
session_start();
}
?>
<?php include ('lan-config.php')?>
<?php include (ABSPATH. 'lan-header.php') ?>
<?php
?>
<body>
I checked to see whether a session even starts, and nothing is happening. Not to mention my login script works and sets all the $_Session variables and then on refresh they dissapear.
Any ideas? I checked what I was sending in header / config and I don't even use the "Header Location" doo dah
:)
</div>
As the error message tells you, there is already an output before the call of session_start. Because this function modify header informations, you can't make any output before. Have a look at this awesome answer to understand why.
So, change this :
<!DOCTYPE html>
<html lang="en">
<?php if (!isset($_SESSION)) {
session_start();
}
?>
<?php include ('lan-config.php')?>
<?php include (ABSPATH. 'lan-header.php') ?>
<?php
?>
<body>
To this
<?php
if (!isset($_SESSION)) {
session_start();
}
?>
<!DOCTYPE html>
<html lang="en">
<?php include ('lan-config.php')?>
<?php include (ABSPATH. 'lan-header.php') ?>
<?php
?>
<body>
Maybe you will need to include lan-config.php and lan-header.php before the doctype HTML tag too, it depends of what you do in these files.