Codeigniter variables

Question

I'm a codeigniter beginner. I'm using version 2.0.2 with a local server (php 5.3) and I have a start controller with code like this (just for testing obviously):

<?php  

class Start extends CI_Controller
{
    var $base;
    function _construct()
    {
        parent::_construct();
        $this->base = $this->config->item('base_url');
    }   
    function hello()
    {
        $data['base'] = $this->base;
        print_r ($data);
    }


}

When I navigate to the hello function the $data['base'] array element is empty. Why should that be when the construct function has populated it with 'base_url' from the config file?

Seems that the variable $base is not available outside the construct function but I can't understand why or how to fix. Can anyone advise please?

did you try with a fake string? $this->base = 'test'; on the constructor — Dalen
– Dalen, Commented Jun 20, 2011 at 15:32

gen_Eric · Accepted Answer · 2011-06-20 17:25:54Z

4

Your constructor should be __construct() (2 underscores).

function __construct()
{
   parent::__construct();
   $this->base = $this->config->item('base_url');
}

Also, as other people have mentioned, if you load the 'url_helper', you can get the base_url by calling base_url().

$this->load->helper('url');
$this->base = base_url();

answered Jun 20, 2011 at 17:25

gen_Eric

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1 Comment

user791379 Over a year ago

Many thanks - it was the two underscores that fooled me. Everything then fell into place

iamjonesy · Accepted Answer · 2011-06-20 16:00:32Z

1

Did you know you can do

$this->load->helper('url');
$base = base_url();

Or even in the view:

<?php echo base_url(); ?>

answered Jun 20, 2011 at 16:00

iamjonesy

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Comments

Alex · Accepted Answer · 2011-06-20 16:59:54Z

1

Use it like this:

class Start extends CI_Controller
{
 private $base = ''; 
 function _construct()
 {
    parent::_construct();

    $this->base = $this->config->item('base_url');
 }

 function hello()
 {
    $data['base'] = $this->base;
    print_r ($data);
 }
}

Or in the autoload.php configure:

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

and then you can use base_url(); everywhere in your code.

answered Jun 20, 2011 at 16:59

Alex

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