Gdn_Format::alphaNumeric PHP Method

    public static function alphaNumeric($Mixed)
    {
        if (!is_string($Mixed)) {
            return self::to($Mixed, 'ForAlphaNumeric');
        } else {
            return preg_replace('/([^\\w-])/', '', $Mixed);
        }
    }

 /**
  * Output markup for extended profile fields.
  *
  * @param array $profileFields Formatted profile fields.
  * @param array $allFields Extended profile field data.
  * @param array $magicLabels "Magic" labels configured on the Profile Extender plug-in class.
  */
 function extendedProfileFields($profileFields, $allFields, $magicLabels = [])
 {
     foreach ($profileFields as $name => $value) {
         // Skip empty and hidden fields.
         if (!$value || !val('OnProfile', $allFields[$name])) {
             continue;
         }
         // Non-magic fields must be plain text, but we'll auto-link
         if (!in_array($name, $magicLabels)) {
             $value = Gdn_Format::links(Gdn_Format::text($value));
         }
         $class = 'Profile' . Gdn_Format::alphaNumeric($name);
         $label = Gdn_Format::text($allFields[$name]['Label']);
         $filteredVal = Gdn_Format::htmlFilter($value);
         echo " <dt class=\"ProfileExtend {$class}\">{$label}</dt> ";
         echo " <dd class=\"ProfileExtend {$class}\">{$filteredVal}</dd> ";
     }
 }