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I have created custom module with custom form, in which I have added input type select. Form submission is working fine, but I wanted set select option value as custom class for BODY tag.

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  • As per @samzha suggestion I used Switch Theme module and it's work fine for me, the only thing I need to create different themes for that. Dec 2, 2014 at 9:39

2 Answers 2

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You can add through custom hook.

 function mytheme_preprocess_html(&$vars) {
  $vars['classes_array'][] = 'new-class';
}

OR

function YOUR_THEME_preprocess_html(&$vars) {
  $path = 'your-drupal-page';
  if (drupal_match_path($_GET['q'], $path) || drupal_match_path(drupal_get_path_alias($_GET['q']), $path)) {
    $vars['classes_array'][] = 'page-my-css-class';
  }
}

If you have any query related how to create then you can check this LINK.

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  • Thanks for quick reply, but how do I get value of Selected option instead of 'new-class'? Dec 1, 2014 at 9:06
  • Means you want to select any option default SELECTED ???
    – Nishant
    Dec 1, 2014 at 9:10
  • I am trying to create option for user to change theme color using select list. Dec 1, 2014 at 9:12
  • Ok now I understand. You have some themes (Color) in your site & you want a select option & through this select option you need to jump one theme to another. Am I right ??
    – Nishant
    Dec 1, 2014 at 9:14
  • Yes, but instead of changing theme I want add class in Body tag Dec 1, 2014 at 9:19
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Seems a pretty odd request and there might be a better way, please explain exactly what you're trying to achieve so a better solution could be offered.

Based upon your original post this could probably be achieved with the combination of Webform, Webform Rules, Rules, Context Rules & Context

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