add custom function to Codeigniter config such as site_url() & base_url() - php

Question

we need to have a new function such as base_url() , named main_site_url() to being able to use it exactly as the same as site_url().
I've just added this to main config file in application/config:
$config['main_site_url'] = 'http//iksna.com/';
and this code to /system/core/config.php
/**
* Main Site URL
* Returns main_site_url . index_page [. uri_string]
*
* #access public
* #param string the URI string
* #return string
*/
function main_site_url($uri = '')
{
if ($uri == '')
{
return $this->slash_item('main_site_url').$this->item('index_page');
}
if ($this->item('enable_query_strings') == FALSE)
{
$suffix = ($this->item('url_suffix') == FALSE) ? '' : $this->item('url_suffix');
return $this->slash_item('main_site_url').$this->slash_item('index_page').$this->_uri_string($uri).$suffix;
}
else
{
return $this->slash_item('main_site_url').$this->item('index_page').'?'.$this->_uri_string($uri);
}
}
// -------------------------------------------------------------
but now, it is not accessible by: main_site_url();
is it accessible by: $this->config->main_site_url();
i have this error when is use main_site_url();
error:
Call to undefined function main_site_url()

Answer 1

You can create your own by the following way:
Step 1:
In you application/config/config.php add this, $config['main_site_url'] = 'http//iksna.com/';
Step 2:
In system/core/Config.php add a new function main_site_url() like base_url(), site_url() which are already defined there:
public function main_site_url($uri = '', $protocol = NULL)
{
$main_site_url = $this->slash_item('main_site_url');
if (isset($protocol))
{
if ($protocol === '')
{
$main_site_url = substr($main_site_url, strpos($main_site_url, '//'));
}
else
{
$main_site_url = $protocol.substr($main_site_url, strpos($main_site_url, '://'));
}
}
return $main_site_url.ltrim($this->_uri_string($uri), '/');
}
Step 3:
Now add the following code in system/helpers/url_helper.php
if ( ! function_exists('main_site_url'))
{
function main_site_url($uri = '', $protocol = NULL)
{
return get_instance()->config->main_site_url($uri, $protocol);
}
}
Now you can use main_site_url() anywhere in your controllers, libraries and views just like base_url(), site_url() etc.

Answer 2

Go to
/system/application/libraries
Create one file named
custom_function.php
add function main_site_url inside custom_function.php
call function in controller file using
$this->custom_function->main_site_url();