PHPbb Passing parameters or define parameters - phpbb

Question

How can {CONSTANT} at the aboutus.html can display "Hello world." which i defined at aboutus.php ?
Many Many Thanks.
aboutus.php - I have define CONSTANT to hello world.
<?php
define('IN_PHPBB', true);
$phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './';
$phpEx = substr(strrchr(__FILE__, '.'), 1);
include($phpbb_root_path . 'common.' . $phpEx);
define("CONSTANT", "Hello world.");
// Start session management
$user->session_begin();
$auth->acl($user->data);
$user->setup();
if ($user->data['user_id'] == ANONYMOUS)
{
login_box('', $user->lang['LOGIN']);
}
page_header('Title Here');
$template->set_filenames(array(
'body' => 'aboutus_body.html',
));
make_jumpbox(append_sid("{$phpbb_root_path}viewforum.$phpEx"));
page_footer();
?>
aboutus_body.html - how can {CONSTANT} display "Hello World." that defined above?
<h2>About Us2</h2>
<div class="panel">
<div class="inner"><span class="corners-top"><span></span></span>
<div class="content">
<p>
We were founded this year to bring you the best forum on the Internet!
We promise to do the following:
<ul>
<li>Provide new content</li>
<li>provide a friendly atmosphere</li>
<li>Provide an environment where you can have fun!</li>
</ul>
<p>{CONSTANT}</p>
</p>
</div>
<span class="corners-bottom"><span></span></span></div>
</div>

Answer 1

Template variables, as you are trying to define, are not traditional PHP Constants. Instead, they are assigned to the template from the PHP file using the template class's assign_var()/assign_vars()/assign_block_vars() methods.
For instance:
<?php
// assign a single template variable
$template->assign_var('CONSTANT', 'Hello World');
/// assign an array of template variables
$template->assign_vars(array(
'CONSTANT' => 'Hello World',
'CONSTANT2' => 'Goodbye World',
));
// assign a loop/block
for($i = 0;....)
{
$template->assign_block_vars('blockname', array(
'CONSTANT' => 'Hello World',
));
}
?>
Note that template variables must be UPPERCASE, and block names must be lowercase.
You then call the variable in the file like so: {CONSTANT}
For a block:
<!-- BEGIN blockname -->
{blockname.CONSTANT}
<!-- END blockname -->