PHP Error- Cannot modify header information-headers already sent

Question

I know this is a fairly common question on here but I am creating a website for my Uni module and my init and config files are causing an error on EVERY page and I can't figure out why. I include my init file on every page and my init file includes my config file! There is nothing being output on line 2 of the init file or in any of the files. I haven't left changed my config variables for this post but this is not what is causing the error.The error is

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /customers/a/b/7/mywebsite/httpd.www/currentpage.php:1) in /customers/a/b/7/mywebsite/httpd.www/config/init.php on line 2

init.php

<?php
session_start();
require_once 'config.php';
?>

config.php

 <?php

    //Database depends on host
    $db['hostname'] = 'myhostname';
    $db['username'] = 'username';
    $db['password'] = 'mypassword';
    $db['database'] = 'database';
    $db['dbdriver'] = 'mysqli';

    //$connection = new mysqli($hostname, $username, $password, $databaseName);

    $connection = new mysqli($db['hostname'], 
    $db['username'],$db['password'],$db['database'] );


    ?>

Currentpage.php

<!DOCTYPE html>
  <head>
      <html lang="en">
  </head>
  <?php
  require 'header.php';

  ?>



    <!-- Primary Page Layout
    –––––––––––––––––––––––––––––––––––––––––––––––––– -->


        <?php
        require 'leftnav.php';
        ?>

 <?php require 'footer.php'; ?>


         </div>
    </div>

  <!-- End Document
    –––––––––––––––––––––––––––––––––––––––––––––––––– -->

Make sure that there isn't any kind of white space before the opening PHP-tag. — M. Eriksson, Nov 21 '17 at 08:21
@SureshKamrushi There is no whitespace before any of the php tags — norskdreamer, Nov 21 '17 at 08:22

score 0 · Accepted Answer · answered Nov 21 '17 at 08:43

0

I believe you are including init.php in header.php. Remove it and include it in currentpage.php before:

<?php include('init.php'); ?>
<!DOCTYPE html>

Or better yet add the following in header.php, and include init.php before any html tag, Like:

<?php include('init.php'); ?>
<!DOCTYPE html>
  <head>
      <html lang="en">
  </head>

There should be no output that should be sent before session_start().

answered Nov 21 '17 at 08:43

mega6382

9,211
17
48
69

Thanks when I run the header.php file on it's own it is fine no error, when I then run my homepage for example the first line of code is the error is still there – norskdreamer Nov 21 '17 at 12:21
make sure there is no space or html code or anything before ` – mega6382 Nov 21 '17 at 12:23
Nope there definitely isn't – norskdreamer Nov 21 '17 at 12:27
Post your code on pastebin.com and post the url here. – mega6382 Nov 21 '17 at 12:27

score 0 · Answer 2 · answered Nov 21 '17 at 09:13

0

Because you have already sent your header by using <!DOCTYPE html> prior session_start();.

answered Nov 21 '17 at 09:13

Artis Zel

61
4

PHP Error- Cannot modify header information-headers already sent

2 Answers2