Codeigniter: A fatal error occurs when using base_url() function to define a constant in "application/config/constants.php" file

Question

I'm using Codeigniter and right now I'm trying to define some constants to hold full paths to some folders like css, js, images, etc. and I've tried to define these constants in application/config/constants.php file like this:

define("PATH_TO_CSS_FOLDER", base_url("assets/css"));

but I've got this error:

Fatal error: Call to undefined function base_url() in D:\xampp\htdocs\demo\application\config\constants.php on line 44

so how can I define these constants without having to write the absolute path in the constants.php file like this:

define("PATH_TO_CSS_FOLDER", "http://my-website.com/assets/css");

How do you load the helper function? Probably you should use autoloading process as described here stackoverflow.com/questions/9009682/… — james_bond
– james_bond, Commented Dec 7, 2013 at 20:01
@james_bond I already load the url helper exactly like that mentioned in the approved answer you've referred to — Amr
– Amr, Commented Dec 7, 2013 at 20:11
Beside the right answer of "Rajeev Ranjan" which I've accepted, I also found this answer stackoverflow.com/a/13825685/458204 for another similar question, and I've found that it is really a great solution for the problem. — Amr
– Amr, Commented Dec 7, 2013 at 20:51

Rajeev Ranjan · Accepted Answer · 2013-12-07 20:10:29Z

3

you can define rest of path in constant.php

define("PATH_TO_CSS_FOLDER","assets/css");

use it later in ohter places

<?php echo base_url(PATH_TO_CSS_FOLDER);?>

you might be knowing that constants loads first then any helper

answered Dec 7, 2013 at 20:10

Rajeev Ranjan

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user2486495 · Accepted Answer · 2013-12-07 19:55:26Z

0

You have to load the url helper to access that function. Either you add

$this->load->helper('url');

somewhere in your controller, or you can put it into the application/config/autoload.php to be loaded automatically everywhere.

you have to use echo before base_url() function. otherwise it woudn't print the base url. like

echo base_url();

edited Dec 7, 2013 at 19:55

answered Dec 7, 2013 at 19:47

user2486495

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4 Comments

Amr Over a year ago

I already have url helper autoloaded, and that didn't fix the problem

user2486495 Over a year ago

Did u try site_url() ?

user2486495 Over a year ago

you have to use echo before base_url() function. otherwise it woudn't print the base url.

Amr Over a year ago

Yes I did, and it is the same as base_url() returns a fatal error

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