function template_preprocess

Adds a default set of helper variables for preprocessors and templates.

This function is called for every theme hook. It is the first in the sequence of preprocessing functions called when preparing variables for a template.

See the Default theme implementations topic for details.

File

core/includes/theme.inc, line 1267

Code

function template_preprocess(&$variables, $hook, $info) {
    // Merge in variables that don't depend on hook and don't change during a
    // single page request.
    // Use the advanced drupal_static() pattern, since this is called very often.
    static $drupal_static_fast;
    if (!isset($drupal_static_fast)) {
        $drupal_static_fast['default_variables'] =& drupal_static(__FUNCTION__);
    }
    $default_variables =& $drupal_static_fast['default_variables'];
    if (!isset($default_variables)) {
        $default_variables = _template_preprocess_default_variables();
    }
    $variables += $default_variables;
    // When theming a render element, merge its #attributes into
    // $variables['attributes'].
    if (isset($info['render element'])) {
        $key = $info['render element'];
        if (isset($variables[$key]['#attributes'])) {
            $variables['attributes'] = AttributeHelper::mergeCollections($variables['attributes'], $variables[$key]['#attributes']);
        }
    }
}