Club Drupal

<?php

/**

 * @file

 * Save custom CSS to file

 */

function at_core_submit_custom_css($values, $theme_name, $path) {

  $custom_css = '';

  if (!empty($values['custom_css'])) {

    // sanitize user entered data

    $custom_css = filter_xss_admin($values['custom_css']);

  }

  $file_name = $theme_name . '.custom.css';

  $filepath = $path . '/' . $file_name;

  file_unmanaged_save_data($custom_css, $filepath, FILE_EXISTS_REPLACE);

}