/**
  * 将数据库信息写入配置文件中
  */
 private function writeConfig()
 {
     $dbHost = LsYii::getPostValue('dbHost');
     $dbName = LsYii::getPostValue('dbName');
     $dbUsername = LsYii::getPostValue('dbUsername');
     $dbPassword = LsYii::getPostValue('dbPassword');
     $tbPre = LsYii::getPostValue('tbPre');
     self::_appendLog(LsYii::gT("开始写入数据库的配置信息。。。"));
     $dbConfig = ["class" => "yii\\db\\Connection", "dsn" => "mysql:host={$dbHost};dbname={$dbName}", "username" => $dbUsername, "password" => $dbPassword, "charset" => 'utf8', "tablePrefix" => $tbPre, "enableSchemaCache" => true, "schemaCache" => "schemaCache"];
     try {
         $file = LsYii::getAlias("@common/config/db.php");
         FileHelper::writeArray($file, $dbConfig);
         self::_appendLog(LsYii::gT("写入数据库的配置信息成功"));
         unset($dbConfig['class']);
         return $dbConfig;
     } catch (\Exception $ex) {
         $message = LsYii::gT("保存配置文件出错<br/>" . $ex->getMessage());
         self::_appendLog($message, true);
         return false;
     }
 }