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ThinkPHP3.2.3数据库设置新特性

Jun 06, 2016 pm 08:07 PM
thinkphp

前篇文章,我们总结了下ThinkPHP3.2中所产生的新变化,本文我们来详细看下关于数据库这块有哪些新特性,非常细致,有需要的小伙伴参考下。

ThinkPHP3.2.3版本数据库驱动采用PDO完全重写,配置和使用上面也比之前版本更加灵活和强大,我们来了解下如何使用。

首先,3.2.3的数据库配置信息有所调整,完整的数据库设置包括:

复制代码 代码如下:


/* 数据库设置 */
 'DB_TYPE'               =>  '',     // 数据库类型
 'DB_HOST'               =>  '', // 服务器地址
 'DB_NAME'               =>  '',          // 数据库名
 'DB_USER'               =>  '',      // 用户名
 'DB_PWD'                =>  '',          // 密码
 'DB_PORT'               =>  '',        // 端口
 'DB_PREFIX'             =>  '',    // 数据库表前缀
 'DB_PARAMS'          =>  array(), // 数据库连接参数
 'DB_DEBUG'  =>  TRUE, // 数据库调试模式 开启后可以记录SQL日志
 'DB_LITE'             =>  false,    // 使用数据库Lite模式
 'DB_FIELDS_CACHE'       =>  true,        // 启用字段缓存
 'DB_CHARSET'            =>  'utf8',      // 数据库编码默认采用utf8
 'DB_DEPLOY_TYPE'        =>  0, // 数据库部署方式:0 集中式(单一服务器),1 分布式(主从服务器)
 'DB_RW_SEPARATE'        =>  false,       // 数据库读写是否分离 主从式有效
 'DB_MASTER_NUM'         =>  1, // 读写分离后 主服务器数量
 'DB_SLAVE_NO'           =>  '', // 指定从服务器序号

相对3.2.2版本来说,取消了如下设置参数:

复制代码 代码如下:


'DB_FIELDTYPE_CHECK' // 3.2.3强制进行字段类型检测了
 'DB_SQL_BUILD_CACHE' // 3.2.3取消了SQL创建缓存
 'DB_SQL_BUILD_QUEUE' // 3.2.3取消了SQL创建缓存
 'DB_SQL_BUILD_LENGTH' // 3.2.3取消了SQL创建缓存
 'DB_SQL_LOG' // 由新增的DB_DEBUG参数取代
 'DB_BIND_PARAM' // 新版采用PDO 自动参数绑定 无需设置

新增的数据库设置参数包括:

复制代码 代码如下:


'DB_DEBUG'  //用于开启数据库调试模式,开启后即可记录SQL日志
 'DB_LITE' // 是否采用数据库Lite模式连接 开启后只能使用原生SQL查询

3.2.2版本数据库的调试模式和项目的调试模式(由APP_DEBUG常量定义)是绑定的 ,3.2.3版本开始数据库的调试模式是独立设置(由DB_DEBUG参数设置)的。

DB_TYPE参数为数据库类型设置,目前支持的驱动包括mysql/sqlite/oracle/pgsql/sqlsrv/firebird(其他的数据库类型需要增加驱动),设置如下:
'DB_TYPE'=>'mysql', // 不再支持设置为PDO 也不再区分mysql和mysqli
复制代码
数据库的连接信息,主要包括下面参数:

复制代码 代码如下:


'DB_HOST'               =>  '', // 服务器地址 采用IP地址
 'DB_NAME'               =>  '',          // 数据库名
 'DB_USER'               =>  '',      // 用户名
 'DB_PWD'                =>  '',          // 密码
 'DB_PORT'               =>  '',        // 端口 留空则取默认端口
 'DB_CHARSET'            =>  '',      // 数据库编码

以上设置参数会在实例化PDO的时候自动转换为PDO的连接参数传入。

DB_DSN参数一般无需设置,系统的数据库驱动会进行默认设置,,如果需要调整,请遵循PDO的相关数据库连接的DSN设置进行设置。

DB_PARAMS用于设置数据库的连接参数,会传入PDO实例化的第四个参数。

下面是一个典型的数据库全局设置:

复制代码 代码如下:

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