Q:

base_url() function not working in codeigniter

In my web application using codeigniter. I am trying to use base_url() function but it shows empty results. I have also used autoload helper through autoload file, but then too it doesn't seem to work. Also I had defined base constants but all in vain.
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title><?php echo $title; ?></title>        
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
        <link rel="stylesheet" href="<?php echo base_url();?>/css/template/default.css" type="text/css" />
        <script type="text/javascript">
            //<![CDATA[
            base_url = '<?= base_url();?>';
            //]]>
        </script>
    </head>

A:

In order to use base_url(), you must first have the URL Helper loaded. This can be done either in application/config/autoload.php (on or around line 67):
$autoload['helper'] = array('url');

Or, manually:
$this->load->helper('url');

Once it's loaded, be sure to keep in mind that base_url() doesn't implicitly print or echo out anything, rather it returns the value to be printed:
echo base_url();

Remember also that the value returned is the site's base url as provided in the config file. CodeIgniter will accomodate an empty value in the config file as well:

If this (base_url) is not set then CodeIgniter will guess the protocol, domain and path to your installation.
application/config/config.php, line 13

A:

If you want to use base_url(), so we need to load url helper.

By using autoload $autoload['helper'] = array('url');
Or by manually load in controller or in view  $this->load->helper('url');

Then you can user base_url() anywhere in controller or view.

A:

First of all load URL helper. you can load in  "config/autoload.php" file and add following code 
$autoload['helper'] = array('url');
or in controller add following code 
$this->load->helper('url');

then go to config.php in cofig folder and set
$config['base_url'] = 'http://urlbaseurl.com/';

hope this will help
thanks

