Registry::getBaseHook

public Registry::getBaseHook($hook)

public function getBaseHook($hook) {
  $this->init($this->themeName);
  $base_hook = $hook;
  // Iteratively strip everything after the last '__' delimiter, until a
  // base hook definition is found. Recursive base hooks of base hooks are
  // not supported, so the base hook must be an original implementation that
  // points to a theme function or template.
  while ($pos = strrpos($base_hook, '__')) {
    $base_hook = substr($base_hook, 0, $pos);
    if (isset($this->registry[$base_hook]['exists'])) {
      break;
    }
  }
  if ($pos !== FALSE && $base_hook !== $hook) {
    return $base_hook;
  }
  return FALSE;
}