CodeIgniter Cannot modify header information

Question

Hi Currently Im still Learning CodeIgniter. Im trying to use its session and enabled the session in autoload file

First the file structure of files is like this/

I structure my files like this. all templates will go in views/index.php

my problem is I get this error Cannot modify header information

I have a controller Home

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

    class Home extends CI_Controller{  

        public function index()
        {     
            $view['title'] = 'Welcome';

            $data['data'] = $view;
            $data['content'] = 'home';
            $this->load->view('index',$data);
        }

    }

My views is something like this

views/index.php

<!DOCTYPE html> 
<html lang="en"> 
    <?php     
        //echo ("Welcome User: " . $datas["user_id"]); 
        $this->load->view('header',$data);
        $this->load->view('template/' . $content);
        $this->load->view('footer',$data);
    ?>
</html>

views/header.php

 <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="">
    <meta name="author" content=""> 
    <title><?=$title?></title>  
      <link href="<?=ASSETS_PATH?>css/bootstrap.css" rel="stylesheet"> 
    <link href="<?=ASSETS_PATH?>css/custom.css" rel="stylesheet">  
  </head> 
  <body oncontextmenu="return false">

views/footer.php

   <script src="https://code.jquery.com/jquery-1.10.2.min.js"></script>
    <script src="<?=ASSETS_PATH?>js/bootstrap.min.js"></script>
    <script src="<?=ASSETS_PATH?>js/javascript.js"></script> 
  </body>

then my content

views/template/home.php

<div class="jumbotron mod-jumbotron"> 
    <div class="jm-button" style="text-align:center;">
           <h1>Welcome</h1>
    </div>

</div>

I don't know why do i get that error session. Please hope you could help me. I didn't even set a session. I have just added it in auto load and don't know why i get that header problem. Is my file structure wrong?

A PHP Error was encountered

Severity: Warning

Message: Cannot modify header information - headers already sent by (output started at site/application/controllers/home.php:2)

Filename: libraries/Session.php

Line Number: 675

oh. its define('ASSETS_PATH','http://localhost/site/assets/'); — Snippet
– Snippet, Commented Jan 9, 2014 at 13:48

Mudshark · Accepted Answer · 2014-01-09 15:53:16Z

1

You probably have a space before the opening <?php tag in your Home controller which is causing output.

// a space here is enough to cause output
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');

answered Jan 9, 2014 at 15:53

Mudshark

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1 Comment

Snippet Over a year ago

ooh God What have I done..well you where right Mudshark. Thanks.

Sandeep Vishwakarma · Accepted Answer · 2014-01-09 13:43:30Z

0

Use this line on your config file or autoload file or add in index.php file may be resolved your problem.

ob_start()

answered Jan 9, 2014 at 13:43

Sandeep Vishwakarma

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Comments

Hubert · Accepted Answer · 2014-01-09 13:54:59Z

0

You will have to put the loading of the pages in the controller and not in the views.

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Home extends CI_Controller{  

    public function index()
    {     
        $data['title'] = 'Welcome';
        $this->load->view('header',$data);
        $this->load->view('index',$data);
        $this->load->view('footer',$data);
    }

}

The view is for display, and you control it using the controller.

<script src="<?= base_url(). 'js/javascript.js' ?>"></script> 
<link href="<?=base_url(). 'css/custom.css'?>" rel="stylesheet">

answered Jan 9, 2014 at 13:54

Hubert

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4 Comments

Snippet Over a year ago

well. thanks about the base_url(). I tried editing my site but still i get the error

Hubert Over a year ago

Remove the session from autoload and try again. It is probably the session that is causing the error.

Snippet Over a year ago

yup. when i add the session it cause the error. But I need the session library.

Hubert Over a year ago

Add the encryption key in the config.php. In CI, sessions are store in tables so you will need to create a table in your database to save the sessions

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