Undefined variable - base_url in include() in Drupal 7 html.tpl.php

Question

I am getting this error, but everything else is fine; even that variable is getting printed. Then why does the error appear?

Notice: Undefined variable: base_url in include() (line 26 of htdocs\atins\drupal\sites\all\themes\live\html.tpl.php).

Notice: Undefined variable: base_path in include() (line 26 of htdocs\atins\drupal\sites\all\themes\live\html.tpl.php).

This is my code:

<a href="<?php print $base_url;?>"><img src="<?php print $base_path . $directory; ?>/img/logo.png" height="35" width="211" alt="AtinsLive Logo" title="Home" /></a>

Answer 1

You will need to bring the variable $base_url and $base_path into the global scope. At the top of your function or template file add:

global $base_path, $base_url;

or call base_path()

Answer 2

I ran into this same issue when using $base_url in page.tpl.php in the following:

print l(theme('image', array('path'=>path_to_theme().'/css/images/logo_orig.png')), $base_url, array('html' => 'true'));

I fixed this by preprocessing $base_url in template.php:

function yourTheme_preprocess_page(&$vars, $hook) {
  global $base_url;
  $vars['base_url'] = $base_url;
}

So, I'm thinking you can preprocess you html template as well. This will be cleaner that calling a global in your tpl directly.