Session Start Error

Question

I know this has been posted before but none of the other answers worked for me. Here is my problem: I am making a login page for my website. I keep getting this error and I cant get rid of it:

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/howto570/public_html/admin/index.php:1) in /home/howto570/public_html/admin/index.php on line 6

now here is the first bit of code

<?php

    $session_prefix = "henry_";
    $default_title = "Admin Panel";
    $folder_root = "/admin";
                session_start();
    require("../auth.php");
    $userdata = array();
?>

Even when I slash out all the other code like so:

<?php
session_start();
//$session_prefix = "henry_";
//$default_title = "Admin Panel";
//$folder_root = "/admin";

//require("../auth.php");
//$userdata = array();
?>

I still get the error.

So im at a loss not sure what to do, you can see the site itself here: www.howtotech.ca/admin/ . I dont know what to do.

Is this the start of your php file or there are some html before this code? — Jorge Campos, Jan 14 '15 at 03:23
Did your try the session_start(); at top of the page (start) ? — vijaykumar, Jan 14 '15 at 03:25
So do the following test: put the session_start command at the very first line of php code and take out all the rest then run your page, procede adding line by line until the error, then update your question with the exactly line that when added the error appears — Jorge Campos, Jan 14 '15 at 03:29
the message says that output started at line number 1.See in your editor (with line number displaying), what is at line no 1 , — Istiaque Ahmed, Jan 14 '15 at 03:36
@TrevorClarke: If your PHP file gets included by another script that outputs text before, you can't start a session. — Julian F. Weinert, Jan 14 '15 at 03:44

score 0 · Answer 1 · answered Jan 14 '15 at 03:46

From looking at your link, it looks like you are probably including this script in another script. There is HTML being outputted before your error message (ie. the head section). You can fix this by moving the session_start() to the top of the script that is including your script.

score 0 · Answer 2 · answered Jan 14 '15 at 04:15

This mostly happens because something is outputted before the session_start(). Even if you have single space before the starting of php remove it, the session_start should come before any output. If this doesn't work than most probably your editor can't see the blank space so you have to create a new file and paste the content in it.

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

Hope this helps you

Session Start Error

2 Answers2