template.php for drupal 6

hi,

i tried to customize my theme with template.php but the source example isn't working for drupal 6. Can we have a new sample for the lasted version.

Thank
Florent

/**
* @file
* Example template.php for service_links.module
* Use print $service_links to insert links in your node.tpl.php or you page.tpl.php file.
*/

function _phptemplate_variables($hook, $vars) {
switch($hook) {
case 'node':
case 'page':
if (module_exists('service_links')) {
$vars['service_links'] = theme('links', service_links_render($vars['node'], TRUE));
}
break;
}
return $vars;
}