How to get base url in CodeIgniter 2.*

问题:

In config.php

$config['base_url'] = 'http://localhost/codeigniter/';

In View

<link rel="stylesheet" href="<?php base_url(); ?>css/default.css" type="text/css" />

=> Error: Call to undefined function base_url(); Help me

回答1:

To use base_url() (shorthand), you have to load the URL Helper first

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

Or you can autoload it by changing application/config/autoload.php

Or just use

$this->config->base_url();

Same applies to site_url().

Also I can see you are missing echo (though its not your current problem), use the code below to solve the problem

<link rel="stylesheet" href="<?php echo base_url(); ?>css/default.css" type="text/css" />

回答2:

I know this is very late, but is useful for newbies. We can atuload url helper and it will be available throughout the application. For this in application\config\autoload.php modify as follows -

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

回答3:

You need to load the URL Helper in order to use base_url(). In your controller, do:

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

Then in your view you can do:

echo base_url();

回答4:

Just load helper class

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

thats it.

回答5:

You need to add url helper in config/autoload

$autoload['helper'] = array('form', 'url', 'file', 'html'); <-- Like This

Then you can use base_url or any kind of url.