How to concatenate base url with another variable in code igniter - php

Question

I need to concatenate the base url with another variable which should be public in the class. How can I do this?
Here is my code :
class site extends CI_Controller
{
public $site_favicon = base_url().'img/favicon.ico';
// I tried even public $site_favicon = base_url();.'img/favicon.ico';
}
Where i will call the variable $t publicly any where from the site.
How can i do this ?
This is how I will call:
<link rel="shortcut icon" href="<?php echo $this->site_favicon; ?>">
I am getting:
Parse error: syntax error, unexpected '(', expecting ',' or ';' in /opt/lampp/htdocs/ci/application/controllers/site.php on line 23
What mistake am I doing in concatenation and how can i fix this?

Answer 1

Try with this
class site extends CI_Controller
{
public function __construct()
{
parent::__construct();
$this->load->helper(array('url'));
$url=$this->config->base_url();
$this->site_favicon=$url.'img/favicon.ico';
}
}
Now you can access site_favicon in functions with echo $this->site_favicon;
<link rel="shortcut icon" href="<?php echo $this->site_favicon ?>">
Note : If you want variables set in the constructor accessible, then you have to set them as a class property ie., like $this->variablename and access them in the same way with $this->variablename in your functions.

Answer 2

You can't assign function inside class varable, base_url is helper function, that is initialized in system autoload
So you can use directly in views
Try this way
<link rel="shortcut icon" href="<?php echo base_url("img/favicon.ico"); ?>">
OR
<link rel="shortcut icon" href="<?php echo base_url()."img/favicon.ico"; ?>">
UPDATE: You should assign favicon value in view variable, the view variables are defined in controller -> action method
In controller
$favicon = base_url().'img/favicon.ico';
$this->load->view("viewName", array("favicon" => $favicon));
In view you can access variable
<link rel="shortcut icon" href="<?php $favicon; ?>">
NOTE: you can't access controller class variable value directly in view