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php – How to set proper codeigniter base url?

Posted by: admin April 23, 2020 Leave a comment


when I had my site on development environment – it was url: testurl.com

Now on production server my codeigniter app’s address has to be someurl.com/mysite/

I moved it there, and everytime I’m trying to run some function, example /home/test – it gets me into someurl.com/home/test – which is WRONG.

It has to be someurl.com/mysite/home/test – How to fix it? I did set

$config['base_url'] = someurl.com/mysite/
How to&Answers:

Base URL should be absolute, including the protocol:

$config['base_url'] = "http://somesite.com/somedir/";

If using the URL helper, then base_url() will output the above string.

Passing arguments to base_url() or site_url() will result in the following (assuming $config['index_page'] = "index.php";:

echo base_url('assets/stylesheet.css'); // http://somesite.com/somedir/assets/stylesheet.css
echo site_url('mycontroller/mymethod'); // http://somesite.com/somedir/index.php/mycontroller/mymethod



config > config

codeigniter file structure


$config['base_url'] = "your Website url";


$config['base_url']  =  "http://".$_SERVER['HTTP_HOST'];

$config['base_url'] .= preg_replace('@/[email protected]', '', dirname($_SERVER['SCRIPT_NAME'])).'/';


Well that’s very interesting, Here is quick and working code:


 * Define APP_URL Dynamically
 * Write this at the bottom of index.php
 * Automatic base url
define('APP_URL', ($_SERVER['SERVER_PORT'] == 443 ? 'https' : 'http') . "://{$_SERVER['SERVER_NAME']}".str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME'])); 


| Base Site URL
| URL to your CodeIgniter root. Typically this will be your base URL,
| WITH a trailing slash:
|   http://example.com/
| If this is not set then CodeIgniter will guess the protocol, domain and
| path to your installation.
$config['base_url'] = APP_URL;

CodeIgniter ROCKS!!! 🙂


If you leave it blank the framework will try to autodetect it since version 2.0.0.

But not in 3.0.0, see here: config.php


I think CodeIgniter 3 recommends to set $config['base_url'] to a full url manually in order to avoid HTTP header injection.

If you are not concerned about it, you can simply add the following lines in your


defined('BASE_URL') OR define('BASE_URL', (is_https() ? 'https://' : 'http://') . $_SERVER['HTTP_HOST'] . dirname($_SERVER['SCRIPT_NAME']) . '/');
$config['base_url'] = BASE_URL;

In this way you also have BASE_URL constant available in all your project code (including the views) and you don’t have to use functions:

config_item('base_url') //returns BASE_URL
$this->config->item('base_url'); //returns BASE_URL


After declaring the base url in config.php, (note, if you are still getting the same error, check autoload.php)

$config['base_url'] = "http://somesite.com/somedir/";

Check “autoload”

CodeIgniter file structure:


And enable on autoload:

$autoload['helper'] = array(**'url',** 'file');

And it works.


this is for server nd live site i apply in hostinger.com and its working fine

1st : $config['base_url'] = 'http://yoursitename.com'; (in confing.php)

2) : src="<?=base_url()?>assest/js/wow.min.js" (in view file )

3) : href="<?php echo base_url()?>index.php/Mycontroller/Method" (for url link or method calling )


application > config > config.php

search for $config[‘base_url’] and put your site like “//example.com” (skip protocol)

 $config['base_url'] = "//someurl.com/";

This works for me.


You may use default base URL path for any server
That have to used in config folder > config.php files
replace you :

$config['base_url'] = 'index.php';

by this code:
$config['base_url'] = "http://".$_SERVER['HTTP_HOST'];
$config['base_url'] .= preg_replace('@/[email protected]','',dirname($_SERVER['SCRIPT_NAME'])).'/';

it’s auto found your folder form any server


Do you miss Double quotation marks?

$config[‘base_url’] = “someurl.com/mysite”


Dynamic Base Url (codeigniter)

Just overwrite the line in config/config.php with the following:

$config[‘base_url’] = ‘http://’.$_SERVER[‘HTTP_HOST’].’/’;


$config['base_url'] = "http://".$_SERVER['SERVER_NAME']."/project_name/";

this way you config you base_url , then won’t worry about in hosting. both works in localhost and server.


Base url set in CodeIgniter for all url

$config['base_url'] = "http://".$_SERVER['HTTP_HOST']."/";


Change in config.php like this.

$ark_root  = "http://".$_SERVER['HTTP_HOST'];
$ark_root .= str_replace(basename($_SERVER['SCRIPT_NAME']),"",$_SERVER['SCRIPT_NAME']);
$config['base_url'] = $ark_root;


Base URL should be absolute, including the protocol:

$config['base_url'] = "http://".$_SERVER['SERVER_NAME']."/mysite/";

This configuration will work in both localhost and server.

Don’t forget to enable on autoload:

$autoload['helper'] = array('url','file');

Then base_url() will output as below

echo base_url('assets/style.css'); //http://yoursite.com/mysite/assets/style.css


Try to add the controller to your index page aswell. Just looked at as similar structure on one of my own site and I hade my base url set to = “somedomain.com/v2/controller”