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Altering forms from the theme layer

Drupal: 14m
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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

This chapter gives an introduction to how you work with Drupal's renderable, form arrays by adding an image button to the search form. It also walks through the process of adding the necessary classes to a form element so that the image button is properly aligned. The Forms API reference document is a pretty essential reference document for creating and editing forms in Drupal.

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