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Adding new variables to a specific node type

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Advanced Theming for Drupal 7 Series

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1. Introduction Advanced Theming in Drupal 7 FREE 12m
2. PHP for Themers FREE 13m
3. Altering variables with preprocess functions 14m
4. Adding new variables with preprocess functions 10m
5. Adding new variables to a specific node type 13m
6. Adding conditional CSS and JavaScript 10m
7. Dynamic templates with theme hook suggestions 14m
8. Overriding theme functions 9m
9. Creating a preprocess function for a theme function 11m
10. Function name suggestions 18m
11. Theme alter hooks for CSS and JavaScript 7m
12. Altering the page from the theme layer 13m
13. Altering forms from the theme layer 14m
14. Best practices for hook_form_alter() 10m
15. Theming forms 30m
16. Theme settings 16m
17. Strategies for keeping template files clean 9m
Information

We'll go a step further with our preprocess functions and look at working with node variables, and how to limit new variables to only specific content types.

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mediaworks on November 27, 2011 - 10:44am

I noticed in this tutorial we were targeting article node types. So I'm assuming we could have written

function ninesixtyrobots_preprocess_node_article(&$variables){

I'm just wondering if this is true and why not do it this way?

Thanks

miche on November 29, 2011 - 12:50pm

For preprocess functions in a theme, you can only name the function using the base name of the template like 'page' or 'node' where page/node is actually the hook. See http://api.drupal.org/api/drupal/includes--theme.inc/function/theme/7

However, you may add a new function in template.php to allow for the desired functionality of also including the content type in the function name:


function THEMNAME_preprocess_node(&$variables) {
$function = 'THEMENAME_preprocess_node_' . $variables['node']->type;
if (function_exists($function)) {
$function($variables);
}
}

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