PMA\libraries\config\FormDisplay::_validate PHP Method

    private function _validate()
    {
        if ($this->_isValidated) {
            return;
        }
        $paths = array();
        $values = array();
        foreach ($this->_forms as $form) {
            /* @var $form Form */
            $paths[] = $form->name;
            // collect values and paths
            foreach ($form->fields as $path) {
                $work_path = array_search($path, $this->_systemPaths);
                $values[$path] = $this->_configFile->getValue($work_path);
                $paths[] = $path;
            }
        }
        // run validation
        $errors = Validator::validate($this->_configFile, $paths, $values, false);
        // change error keys from canonical paths to work paths
        if (is_array($errors) && count($errors) > 0) {
            $this->_errors = array();
            foreach ($errors as $path => $error_list) {
                $work_path = array_search($path, $this->_systemPaths);
                // field error
                if (!$work_path) {
                    // form error, fix path
                    $work_path = $path;
                }
                $this->_errors[$work_path] = $error_list;
            }
        }
        $this->_isValidated = true;
    }