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186 lines
4.4 KiB
186 lines
4.4 KiB
4 years ago
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<?php
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if (!defined('__TYPECHO_ROOT_DIR__')) exit;
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/**
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* Typecho Blog Platform
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*
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* @copyright Copyright (c) 2008 Typecho team (http://www.typecho.org)
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* @license GNU General Public License 2.0
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* @version $Id: Mysql.php 89 2008-03-31 00:10:57Z magike.net $
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*/
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/**
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* 数据库PDOMysql适配器
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*
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* @package Db
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*/
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abstract class Typecho_Db_Adapter_Pdo implements Typecho_Db_Adapter
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{
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/**
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* 数据库对象
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*
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* @access protected
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* @var PDO
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*/
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protected $_object;
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/**
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* 最后一次操作的数据表
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*
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* @access protected
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* @var string
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*/
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protected $_lastTable;
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/**
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* 判断适配器是否可用
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*
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* @access public
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* @return boolean
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*/
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public static function isAvailable()
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{
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return class_exists('PDO');
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}
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/**
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* 数据库连接函数
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*
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* @param Typecho_Config $config 数据库配置
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* @throws Typecho_Db_Exception
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* @return resource
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*/
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public function connect(Typecho_Config $config)
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{
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try {
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$this->_object = $this->init($config);
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$this->_object->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
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return $this->_object;
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} catch (PDOException $e) {
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/** 数据库异常 */
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throw new Typecho_Db_Adapter_Exception($e->getMessage());
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}
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}
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/**
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* 获取数据库版本
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*
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* @param mixed $handle
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* @return string
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*/
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public function getVersion($handle)
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{
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return 'pdo:' . $handle->getAttribute(PDO::ATTR_DRIVER_NAME)
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. ' ' . $handle->getAttribute(PDO::ATTR_SERVER_VERSION);
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}
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/**
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* 初始化数据库
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*
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* @param Typecho_Config $config 数据库配置
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* @abstract
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* @access public
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* @return PDO
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*/
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abstract public function init(Typecho_Config $config);
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/**
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* 执行数据库查询
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*
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* @param string $query 数据库查询SQL字符串
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* @param mixed $handle 连接对象
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* @param integer $op 数据库读写状态
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* @param string $action 数据库动作
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* @throws Typecho_Db_Exception
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* @return resource
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*/
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public function query($query, $handle, $op = Typecho_Db::READ, $action = NULL)
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{
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try {
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$isQueryObject = $query instanceof Typecho_Db_Query;
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$this->_lastTable = $isQueryObject ? $query->getAttribute('table') : NULL;
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$resource = $handle->prepare($isQueryObject ? $query->__toString() : $query);
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$resource->execute();
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} catch (PDOException $e) {
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/** 数据库异常 */
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throw new Typecho_Db_Query_Exception($e->getMessage(), $e->getCode());
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}
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return $resource;
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}
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/**
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* 将数据查询的其中一行作为数组取出,其中字段名对应数组键值
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*
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* @param resource $resource 查询返回资源标识
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* @return array
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*/
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public function fetch($resource)
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{
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return $resource->fetch(PDO::FETCH_ASSOC);
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}
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/**
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* 将数据查询的其中一行作为对象取出,其中字段名对应对象属性
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*
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* @param resource $resource 查询的资源数据
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* @return object
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*/
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public function fetchObject($resource)
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{
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return $resource->fetchObject();
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}
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/**
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* 引号转义函数
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*
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* @param string $string 需要转义的字符串
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* @return string
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*/
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public function quoteValue($string)
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{
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return $this->_object->quote($string);
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}
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/**
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* 对象引号过滤
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*
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* @access public
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* @param string $string
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* @return string
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*/
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public function quoteColumn($string){}
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/**
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* 合成查询语句
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*
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* @access public
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* @param array $sql 查询对象词法数组
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* @return string
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*/
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public function parseSelect(array $sql){}
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/**
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* 取出最后一次查询影响的行数
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*
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* @param resource $resource 查询的资源数据
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* @param mixed $handle 连接对象
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* @return integer
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*/
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public function affectedRows($resource, $handle)
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{
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return $resource->rowCount();
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}
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/**
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* 取出最后一次插入返回的主键值
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*
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* @param resource $resource 查询的资源数据
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* @param mixed $handle 连接对象
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* @return integer
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*/
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public function lastInsertId($resource, $handle)
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{
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return $handle->lastInsertId();
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}
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}
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