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1298 rader
43 KiB
1298 rader
43 KiB
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace Think\Db;
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use PDO;
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use Think\Config;
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use Think\Debug;
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abstract class Driver
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{
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// PDO操作实例
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protected $PDOStatement = null;
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// 当前操作所属的模型名
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protected $model = '_think_';
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// 当前SQL指令
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protected $queryStr = '';
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protected $modelSql = array();
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// 最后插入ID
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protected $lastInsID = null;
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// 返回或者影响记录数
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protected $numRows = 0;
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// 事物操作PDO实例
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protected $transPDO = null;
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// 事务指令数
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protected $transTimes = 0;
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// 错误信息
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protected $error = '';
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// 数据库连接ID 支持多个连接
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protected $linkID = array();
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// 当前连接ID
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protected $_linkID = null;
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// 数据库连接参数配置
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protected $config = array(
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'type' => '', // 数据库类型
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'hostname' => '127.0.0.1', // 服务器地址
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'database' => '', // 数据库名
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'username' => '', // 用户名
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'password' => '', // 密码
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'hostport' => '', // 端口
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'dsn' => '', //
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'params' => array(), // 数据库连接参数
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'charset' => 'utf8', // 数据库编码默认采用utf8
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'prefix' => '', // 数据库表前缀
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'debug' => false, // 数据库调试模式
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'deploy' => 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)
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'rw_separate' => false, // 数据库读写是否分离 主从式有效
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'master_num' => 1, // 读写分离后 主服务器数量
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'slave_no' => '', // 指定从服务器序号
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'db_like_fields' => '',
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);
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// 数据库表达式
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protected $exp = array('eq' => '=', 'neq' => '<>', 'gt' => '>', 'egt' => '>=', 'lt' => '<', 'elt' => '<=', 'notlike' => 'NOT LIKE', 'like' => 'LIKE', 'in' => 'IN', 'notin' => 'NOT IN', 'not in' => 'NOT IN', 'between' => 'BETWEEN', 'not between' => 'NOT BETWEEN', 'notbetween' => 'NOT BETWEEN');
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// 查询表达式
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protected $selectSql = 'SELECT%DISTINCT% %FIELD% FROM %TABLE%%FORCE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%%LIMIT% %UNION%%LOCK%%COMMENT%';
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// 查询次数
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protected $queryTimes = 0;
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// 执行次数
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protected $executeTimes = 0;
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// PDO连接参数
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protected $options = array(
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PDO::ATTR_CASE => PDO::CASE_LOWER,
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
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PDO::ATTR_STRINGIFY_FETCHES => false,
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);
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protected $bind = array(); // 参数绑定
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/**
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* 架构函数 读取数据库配置信息
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* @access public
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* @param array $config 数据库配置数组
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*/
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public function __construct($config = '')
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{
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if (!empty($config)) {
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$this->config = array_merge($this->config, $config);
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if (is_array($this->config['params'])) {
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$this->options = $this->config['params'] + $this->options;
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}
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}
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}
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/**
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* 连接数据库方法
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* @access public
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*/
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public function connect($config = '', $linkNum = 0, $autoConnection = false)
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{
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if (!isset($this->linkID[$linkNum])) {
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if (empty($config)) {
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$config = $this->config;
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}
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try {
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if (empty($config['dsn'])) {
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$config['dsn'] = $this->parseDsn($config);
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}
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if (version_compare(PHP_VERSION, '5.3.6', '<=')) {
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// 禁用模拟预处理语句
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$this->options[PDO::ATTR_EMULATE_PREPARES] = false;
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}
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$this->linkID[$linkNum] = new PDO($config['dsn'], $config['username'], $config['password'], $this->options);
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} catch (\PDOException $e) {
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if ($autoConnection) {
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trace($e->getMessage(), '', 'ERR');
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return $this->connect($autoConnection, $linkNum);
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} elseif ($config['debug']) {
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E($e->getMessage());
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}
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}
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}
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return $this->linkID[$linkNum];
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}
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/**
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* 解析pdo连接的dsn信息
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* @access public
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* @param array $config 连接信息
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* @return string
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*/
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protected function parseDsn($config)
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{}
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/**
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* 释放查询结果
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* @access public
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*/
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public function free()
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{
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$this->PDOStatement = null;
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}
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/**
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* 执行查询 返回数据集
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* @access public
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* @param string $str sql指令
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* @param boolean $fetchSql 不执行只是获取SQL
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* @param boolean $master 是否在主服务器读操作
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* @return mixed
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*/
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public function query($str, $fetchSql = false, $master = false)
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{
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$this->initConnect($master);
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if (!$this->_linkID) {
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return false;
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}
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$this->queryStr = $str;
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if (!empty($this->bind)) {
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$that = $this;
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$this->queryStr = strtr($this->queryStr, array_map(function ($val) use ($that) {return '\'' . $that->escapeString($val) . '\'';}, $this->bind));
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}
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if ($fetchSql) {
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return $this->queryStr;
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}
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//释放前次的查询结果
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if (!empty($this->PDOStatement)) {
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$this->free();
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}
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$this->queryTimes++;
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N('db_query', 1); // 兼容代码
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// 调试开始
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$this->debug(true);
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$this->PDOStatement = $this->_linkID->prepare($str);
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if (false === $this->PDOStatement) {
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$this->error();
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return false;
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}
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foreach ($this->bind as $key => $val) {
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if (is_array($val)) {
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$this->PDOStatement->bindValue($key, $val[0], $val[1]);
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} else {
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$this->PDOStatement->bindValue($key, $val);
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}
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}
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$this->bind = array();
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try {
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$result = $this->PDOStatement->execute();
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// 调试结束
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$this->debug(false);
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if (false === $result) {
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$this->error();
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return false;
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} else {
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return $this->getResult();
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}
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} catch (\PDOException $e) {
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$this->error();
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return false;
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}
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}
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/**
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* 执行语句
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* @access public
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* @param string $str sql指令
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* @param boolean $fetchSql 不执行只是获取SQL
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* @return mixed
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*/
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public function execute($str, $fetchSql = false)
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{
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$this->initConnect(true);
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if (!$this->_linkID) {
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return false;
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}
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$this->queryStr = $str;
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if (!empty($this->bind)) {
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$that = $this;
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$this->queryStr = strtr($this->queryStr, array_map(function ($val) use ($that) {return '\'' . $that->escapeString($val) . '\'';}, $this->bind));
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}
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if ($fetchSql) {
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return $this->queryStr;
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}
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//释放前次的查询结果
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if (!empty($this->PDOStatement)) {
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$this->free();
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}
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$this->executeTimes++;
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N('db_write', 1); // 兼容代码
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// 记录开始执行时间
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$this->debug(true);
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$this->PDOStatement = $this->_linkID->prepare($str);
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if (false === $this->PDOStatement) {
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$this->error();
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return false;
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}
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foreach ($this->bind as $key => $val) {
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if (is_array($val)) {
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$this->PDOStatement->bindValue($key, $val[0], $val[1]);
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} else {
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$this->PDOStatement->bindValue($key, $val);
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}
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}
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$this->bind = array();
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try {
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$result = $this->PDOStatement->execute();
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// 调试结束
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$this->debug(false);
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if (false === $result) {
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$this->error();
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return false;
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} else {
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$this->numRows = $this->PDOStatement->rowCount();
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if (preg_match("/^\s*(INSERT\s+INTO|REPLACE\s+INTO)\s+/i", $str)) {
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$this->lastInsID = $this->_linkID->lastInsertId();
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}
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return $this->numRows;
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}
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} catch (\PDOException $e) {
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$this->error();
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return false;
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}
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}
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/**
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* 启动事务
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* @access public
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* @return void
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*/
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public function startTrans()
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{
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$this->initConnect(true);
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if (!$this->_linkID) {
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return false;
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}
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//数据rollback 支持
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if (0 == $this->transTimes) {
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// 记录当前操作PDO
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$this->transPdo = $this->_linkID;
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$this->_linkID->beginTransaction();
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}
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$this->transTimes++;
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return;
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}
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/**
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* 用于非自动提交状态下面的查询提交
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* @access public
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* @return boolean
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*/
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public function commit()
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{
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if (1 == $this->transTimes) {
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// 由嵌套事物的最外层进行提交
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$result = $this->_linkID->commit();
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$this->transTimes = 0;
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$this->transPdo = null;
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if (!$result) {
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$this->error();
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return false;
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}
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} else {
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$this->transTimes = $this->transTimes <= 0 ? 0 : $this->transTimes - 1;
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}
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return true;
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}
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/**
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* 事务回滚
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* @access public
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* @return boolean
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*/
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public function rollback()
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{
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if ($this->transTimes > 0) {
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$result = $this->_linkID->rollback();
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$this->transTimes = 0;
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$this->transPdo = null;
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if (!$result) {
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$this->error();
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return false;
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}
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}
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return true;
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}
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/**
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* 获得所有的查询数据
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* @access private
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* @return array
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*/
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private function getResult()
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{
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//返回数据集
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$result = $this->PDOStatement->fetchAll(PDO::FETCH_ASSOC);
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$this->numRows = count($result);
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return $result;
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}
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/**
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* 获得查询次数
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* @access public
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* @param boolean $execute 是否包含所有查询
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* @return integer
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*/
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public function getQueryTimes($execute = false)
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{
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return $execute ? $this->queryTimes + $this->executeTimes : $this->queryTimes;
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}
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/**
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* 获得执行次数
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* @access public
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* @return integer
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*/
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public function getExecuteTimes()
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{
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return $this->executeTimes;
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}
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/**
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* 关闭数据库
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* @access public
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*/
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public function close()
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{
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$this->_linkID = null;
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}
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/**
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* 数据库错误信息
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* 并显示当前的SQL语句
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* @access public
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* @return string
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*/
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public function error()
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{
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if ($this->PDOStatement) {
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$error = $this->PDOStatement->errorInfo();
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$this->error = $error[1] . ':' . $error[2];
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} else {
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$this->error = '';
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}
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if ('' != $this->queryStr) {
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$this->error .= "\n [ SQL语句 ] : " . $this->queryStr;
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}
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// 记录错误日志
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trace($this->error, '', 'ERR');
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if ($this->config['debug']) {
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// 开启数据库调试模式
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E($this->error);
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} else {
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return $this->error;
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}
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}
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/**
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* 设置锁机制
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* @access protected
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* @return string
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*/
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protected function parseLock($lock = false)
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{
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return $lock ? ' FOR UPDATE ' : '';
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}
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/**
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* set分析
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* @access protected
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* @param array $data
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* @return string
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*/
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protected function parseSet($data)
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{
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foreach ($data as $key => $val) {
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if (isset($val[0]) && 'exp' == $val[0]) {
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$set[] = $this->parseKey($key) . '=' . $val[1];
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} elseif (is_null($val)) {
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$set[] = $this->parseKey($key) . '=NULL';
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} elseif (is_scalar($val)) {
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// 过滤非标量数据
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if (0 === strpos($val, ':') && in_array($val, array_keys($this->bind))) {
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$set[] = $this->parseKey($key) . '=' . $val;
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} else {
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$name = count($this->bind);
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$set[] = $this->parseKey($key) . '=:' . $key . '_' . $name;
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$this->bindParam($key . '_' . $name, $val);
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}
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}
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}
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return ' SET ' . implode(',', $set);
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}
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/**
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* 参数绑定
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* @access protected
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* @param string $name 绑定参数名
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* @param mixed $value 绑定值
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* @return void
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*/
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protected function bindParam($name, $value)
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{
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$this->bind[':' . $name] = $value;
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}
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/**
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* 字段和表名处理
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* @access public
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* @param string $key
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* @param bool $strict
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* @return string
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*/
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public function parseKey($key, $strict = false)
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{
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return $key;
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}
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/**
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* value分析
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* @access protected
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* @param mixed $value
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* @return string
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*/
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protected function parseValue($value)
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{
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if (is_string($value)) {
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$value = strpos($value, ':') === 0 && in_array($value, array_keys($this->bind)) ? $this->escapeString($value) : '\'' . $this->escapeString($value) . '\'';
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} elseif (isset($value[0]) && is_string($value[0]) && strtolower($value[0]) == 'exp') {
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$value = $this->escapeString($value[1]);
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} elseif (is_array($value)) {
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$value = array_map(array($this, 'parseValue'), $value);
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} elseif (is_bool($value)) {
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$value = $value ? '1' : '0';
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} elseif (is_null($value)) {
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$value = 'null';
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}
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return $value;
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}
|
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|
|
/**
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* field分析
|
|
* @access protected
|
|
* @param mixed $fields
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* @return string
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*/
|
|
protected function parseField($fields)
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{
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if (is_string($fields) && '' !== $fields) {
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$fields = explode(',', $fields);
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}
|
|
if (is_array($fields)) {
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|
// 完善数组方式传字段名的支持
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// 支持 'field1'=>'field2' 这样的字段别名定义
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$array = array();
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foreach ($fields as $key => $field) {
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if (!is_numeric($key)) {
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$array[] = $this->parseKey($key) . ' AS ' . $this->parseKey($field);
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} else {
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$array[] = $this->parseKey($field);
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}
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}
|
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$fieldsStr = implode(',', $array);
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} else {
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$fieldsStr = '*';
|
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}
|
|
//TODO 如果是查询全部字段，并且是join的方式，那么就把要查的表加个别名，以免字段被覆盖
|
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return $fieldsStr;
|
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}
|
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|
|
/**
|
|
* table分析
|
|
* @access protected
|
|
* @param mixed $table
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|
* @return string
|
|
*/
|
|
protected function parseTable($tables)
|
|
{
|
|
if (is_array($tables)) {
|
|
// 支持别名定义
|
|
$array = array();
|
|
foreach ($tables as $table => $alias) {
|
|
if (!is_numeric($table)) {
|
|
$array[] = $this->parseKey($table) . ' ' . $this->parseKey($alias);
|
|
} else {
|
|
$array[] = $this->parseKey($alias);
|
|
}
|
|
|
|
}
|
|
$tables = $array;
|
|
} elseif (is_string($tables)) {
|
|
$tables = array_map(array($this, 'parseKey'), explode(',', $tables));
|
|
}
|
|
return implode(',', $tables);
|
|
}
|
|
|
|
/**
|
|
* where分析
|
|
* @access protected
|
|
* @param mixed $where
|
|
* @return string
|
|
*/
|
|
protected function parseWhere($where)
|
|
{
|
|
$whereStr = '';
|
|
if (is_string($where)) {
|
|
// 直接使用字符串条件
|
|
$whereStr = $where;
|
|
} else {
|
|
// 使用数组表达式
|
|
$operate = isset($where['_logic']) ? strtoupper($where['_logic']) : '';
|
|
if (in_array($operate, array('AND', 'OR', 'XOR'))) {
|
|
// 定义逻辑运算规则 例如 OR XOR AND NOT
|
|
$operate = ' ' . $operate . ' ';
|
|
unset($where['_logic']);
|
|
} else {
|
|
// 默认进行 AND 运算
|
|
$operate = ' AND ';
|
|
}
|
|
foreach ($where as $key => $val) {
|
|
if (is_numeric($key)) {
|
|
$key = '_complex';
|
|
}
|
|
if (0 === strpos($key, '_')) {
|
|
// 解析特殊条件表达式
|
|
$whereStr .= $this->parseThinkWhere($key, $val);
|
|
} else {
|
|
// 查询字段的安全过滤
|
|
// if(!preg_match('/^[A-Z_\|\&\-.a-z0-9\(\)\,]+$/',trim($key))){
|
|
// E(L('_EXPRESS_ERROR_').':'.$key);
|
|
// }
|
|
// 多条件支持
|
|
$multi = is_array($val) && isset($val['_multi']);
|
|
$key = trim($key);
|
|
if (strpos($key, '|')) {
|
|
// 支持 name|title|nickname 方式定义查询字段
|
|
$array = explode('|', $key);
|
|
$str = array();
|
|
foreach ($array as $m => $k) {
|
|
$v = $multi ? $val[$m] : $val;
|
|
$str[] = $this->parseWhereItem($this->parseKey($k), $v);
|
|
}
|
|
$whereStr .= '( ' . implode(' OR ', $str) . ' )';
|
|
} elseif (strpos($key, '&')) {
|
|
$array = explode('&', $key);
|
|
$str = array();
|
|
foreach ($array as $m => $k) {
|
|
$v = $multi ? $val[$m] : $val;
|
|
$str[] = '(' . $this->parseWhereItem($this->parseKey($k), $v) . ')';
|
|
}
|
|
$whereStr .= '( ' . implode(' AND ', $str) . ' )';
|
|
} else {
|
|
$whereStr .= $this->parseWhereItem($this->parseKey($key), $val);
|
|
}
|
|
}
|
|
$whereStr .= $operate;
|
|
}
|
|
$whereStr = substr($whereStr, 0, -strlen($operate));
|
|
}
|
|
return empty($whereStr) ? '' : ' WHERE ' . $whereStr;
|
|
}
|
|
|
|
// where子单元分析
|
|
protected function parseWhereItem($key, $val)
|
|
{
|
|
$whereStr = '';
|
|
if (is_array($val)) {
|
|
if (is_string($val[0])) {
|
|
$exp = strtolower($val[0]);
|
|
if (preg_match('/^(eq|neq|gt|egt|lt|elt)$/', $exp)) {
|
|
// 比较运算
|
|
$whereStr .= $key . ' ' . $this->exp[$exp] . ' ' . $this->parseValue($val[1]);
|
|
} elseif (preg_match('/^(notlike|like)$/', $exp)) {
|
|
// 模糊查找
|
|
if (is_array($val[1])) {
|
|
$likeLogic = isset($val[2]) ? strtoupper($val[2]) : 'OR';
|
|
if (in_array($likeLogic, array('AND', 'OR', 'XOR'))) {
|
|
$like = array();
|
|
foreach ($val[1] as $item) {
|
|
$like[] = $key . ' ' . $this->exp[$exp] . ' ' . $this->parseValue($item);
|
|
}
|
|
$whereStr .= '(' . implode(' ' . $likeLogic . ' ', $like) . ')';
|
|
}
|
|
} else {
|
|
$whereStr .= $key . ' ' . $this->exp[$exp] . ' ' . $this->parseValue($val[1]);
|
|
}
|
|
} elseif ('bind' == $exp) {
|
|
// 使用表达式
|
|
$whereStr .= $key . ' = :' . $val[1];
|
|
} elseif ('exp' == $exp) {
|
|
// 使用表达式
|
|
$whereStr .= $key . ' ' . $val[1];
|
|
} elseif (preg_match('/^(notin|not in|in)$/', $exp)) {
|
|
// IN 运算
|
|
if (isset($val[2]) && 'exp' == $val[2]) {
|
|
$whereStr .= $key . ' ' . $this->exp[$exp] . ' ' . $val[1];
|
|
} else {
|
|
if (is_string($val[1])) {
|
|
$val[1] = explode(',', $val[1]);
|
|
}
|
|
$zone = implode(',', $this->parseValue($val[1]));
|
|
$whereStr .= $key . ' ' . $this->exp[$exp] . ' (' . $zone . ')';
|
|
}
|
|
} elseif (preg_match('/^(notbetween|not between|between)$/', $exp)) {
|
|
// BETWEEN运算
|
|
$data = is_string($val[1]) ? explode(',', $val[1]) : $val[1];
|
|
$whereStr .= $key . ' ' . $this->exp[$exp] . ' ' . $this->parseValue($data[0]) . ' AND ' . $this->parseValue($data[1]);
|
|
} else {
|
|
E(L('_EXPRESS_ERROR_') . ':' . $val[0]);
|
|
}
|
|
} else {
|
|
$count = count($val);
|
|
$rule = isset($val[$count - 1]) ? (is_array($val[$count - 1]) ? strtoupper($val[$count - 1][0]) : strtoupper($val[$count - 1])) : '';
|
|
if (in_array($rule, array('AND', 'OR', 'XOR'))) {
|
|
$count = $count - 1;
|
|
} else {
|
|
$rule = 'AND';
|
|
}
|
|
for ($i = 0; $i < $count; $i++) {
|
|
$data = is_array($val[$i]) ? $val[$i][1] : $val[$i];
|
|
if ('exp' == strtolower($val[$i][0])) {
|
|
$whereStr .= $key . ' ' . $data . ' ' . $rule . ' ';
|
|
} else {
|
|
$whereStr .= $this->parseWhereItem($key, $val[$i]) . ' ' . $rule . ' ';
|
|
}
|
|
}
|
|
$whereStr = '( ' . substr($whereStr, 0, -4) . ' )';
|
|
}
|
|
} else {
|
|
//对字符串类型字段采用模糊匹配
|
|
$likeFields = $this->config['db_like_fields'];
|
|
if ($likeFields && preg_match('/^(' . $likeFields . ')$/i', $key)) {
|
|
$whereStr .= $key . ' LIKE ' . $this->parseValue('%' . $val . '%');
|
|
} else {
|
|
$whereStr .= $key . ' = ' . $this->parseValue($val);
|
|
}
|
|
}
|
|
return $whereStr;
|
|
}
|
|
|
|
/**
|
|
* 特殊条件分析
|
|
* @access protected
|
|
* @param string $key
|
|
* @param mixed $val
|
|
* @return string
|
|
*/
|
|
protected function parseThinkWhere($key, $val)
|
|
{
|
|
$whereStr = '';
|
|
switch ($key) {
|
|
case '_string':
|
|
// 字符串模式查询条件
|
|
$whereStr = $val;
|
|
break;
|
|
case '_complex':
|
|
// 复合查询条件
|
|
$whereStr = substr($this->parseWhere($val), 6);
|
|
break;
|
|
case '_query':
|
|
// 字符串模式查询条件
|
|
parse_str($val, $where);
|
|
if (isset($where['_logic'])) {
|
|
$op = ' ' . strtoupper($where['_logic']) . ' ';
|
|
unset($where['_logic']);
|
|
} else {
|
|
$op = ' AND ';
|
|
}
|
|
$array = array();
|
|
foreach ($where as $field => $data) {
|
|
$array[] = $this->parseKey($field) . ' = ' . $this->parseValue($data);
|
|
}
|
|
|
|
$whereStr = implode($op, $array);
|
|
break;
|
|
}
|
|
return '( ' . $whereStr . ' )';
|
|
}
|
|
|
|
/**
|
|
* limit分析
|
|
* @access protected
|
|
* @param mixed $lmit
|
|
* @return string
|
|
*/
|
|
protected function parseLimit($limit)
|
|
{
|
|
return (!empty($limit) && false === strpos($limit, '(')) ? ' LIMIT ' . $limit . ' ' : '';
|
|
}
|
|
|
|
/**
|
|
* join分析
|
|
* @access protected
|
|
* @param mixed $join
|
|
* @return string
|
|
*/
|
|
protected function parseJoin($join)
|
|
{
|
|
$joinStr = '';
|
|
if (!empty($join)) {
|
|
$joinStr = ' ' . implode(' ', $join) . ' ';
|
|
}
|
|
return $joinStr;
|
|
}
|
|
|
|
/**
|
|
* order分析
|
|
* @access protected
|
|
* @param mixed $order
|
|
* @return string
|
|
*/
|
|
protected function parseOrder($order)
|
|
{
|
|
if (empty($order)) {
|
|
return '';
|
|
}
|
|
$array = array();
|
|
if (is_string($order) && '[RAND]' != $order) {
|
|
$order = array_map('trim', explode(',', $order));
|
|
}
|
|
|
|
if (is_array($order)) {
|
|
foreach ($order as $key => $val) {
|
|
if (is_numeric($key)) {
|
|
list($key, $sort) = explode(' ', strpos($val, ' ') ? $val : $val . ' ');
|
|
} else {
|
|
$sort = $val;
|
|
}
|
|
|
|
if (preg_match('/^[\w\.]+$/', $key)) {
|
|
$sort = strtoupper($sort);
|
|
$sort = in_array($sort, array('ASC', 'DESC'), true) ? ' ' . $sort : '';
|
|
if (strpos($key, '.')) {
|
|
list($alias, $key) = explode('.', $key);
|
|
$array[] = $this->parseKey($alias, true) . '.' . $this->parseKey($key, true) . $sort;
|
|
} else {
|
|
$array[] = $this->parseKey($key, true) . $sort;
|
|
}
|
|
}
|
|
}
|
|
} elseif ('[RAND]' == $order) {
|
|
// 随机排序
|
|
$array[] = $this->parseRand();
|
|
}
|
|
|
|
$order = implode(',', $array);
|
|
return !empty($order) ? ' ORDER BY ' . $order : '';
|
|
}
|
|
|
|
/**
|
|
* group分析
|
|
* @access protected
|
|
* @param mixed $group
|
|
* @return string
|
|
*/
|
|
protected function parseGroup($group)
|
|
{
|
|
return !empty($group) ? ' GROUP BY ' . $group : '';
|
|
}
|
|
|
|
/**
|
|
* having分析
|
|
* @access protected
|
|
* @param string $having
|
|
* @return string
|
|
*/
|
|
protected function parseHaving($having)
|
|
{
|
|
return !empty($having) ? ' HAVING ' . $having : '';
|
|
}
|
|
|
|
/**
|
|
* comment分析
|
|
* @access protected
|
|
* @param string $comment
|
|
* @return string
|
|
*/
|
|
protected function parseComment($comment)
|
|
{
|
|
return !empty($comment) ? ' /* ' . $comment . ' */' : '';
|
|
}
|
|
|
|
/**
|
|
* distinct分析
|
|
* @access protected
|
|
* @param mixed $distinct
|
|
* @return string
|
|
*/
|
|
protected function parseDistinct($distinct)
|
|
{
|
|
return !empty($distinct) ? ' DISTINCT ' : '';
|
|
}
|
|
|
|
/**
|
|
* union分析
|
|
* @access protected
|
|
* @param mixed $union
|
|
* @return string
|
|
*/
|
|
protected function parseUnion($union)
|
|
{
|
|
if (empty($union)) {
|
|
return '';
|
|
}
|
|
|
|
if (isset($union['_all'])) {
|
|
$str = 'UNION ALL ';
|
|
unset($union['_all']);
|
|
} else {
|
|
$str = 'UNION ';
|
|
}
|
|
foreach ($union as $u) {
|
|
$sql[] = $str . (is_array($u) ? $this->buildSelectSql($u) : $u);
|
|
}
|
|
return implode(' ', $sql);
|
|
}
|
|
|
|
/**
|
|
* 参数绑定分析
|
|
* @access protected
|
|
* @param array $bind
|
|
* @return array
|
|
*/
|
|
protected function parseBind($bind)
|
|
{
|
|
$this->bind = array_merge($this->bind, $bind);
|
|
}
|
|
|
|
/**
|
|
* index分析，可在操作链中指定需要强制使用的索引
|
|
* @access protected
|
|
* @param mixed $index
|
|
* @return string
|
|
*/
|
|
protected function parseForce($index)
|
|
{
|
|
if (empty($index)) {
|
|
return '';
|
|
}
|
|
|
|
if (is_array($index)) {
|
|
$index = join(",", $index);
|
|
}
|
|
|
|
return sprintf(" FORCE INDEX ( %s ) ", $index);
|
|
}
|
|
|
|
/**
|
|
* ON DUPLICATE KEY UPDATE 分析
|
|
* @access protected
|
|
* @param mixed $duplicate
|
|
* @return string
|
|
*/
|
|
protected function parseDuplicate($duplicate)
|
|
{
|
|
return '';
|
|
}
|
|
|
|
/**
|
|
* 插入记录
|
|
* @access public
|
|
* @param mixed $data 数据
|
|
* @param array $options 参数表达式
|
|
* @param boolean $replace 是否replace
|
|
* @return false | integer
|
|
*/
|
|
public function insert($data, $options = array(), $replace = false)
|
|
{
|
|
$values = $fields = array();
|
|
$this->model = $options['model'];
|
|
$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
|
|
foreach ($data as $key => $val) {
|
|
if (isset($val[0]) && 'exp' == $val[0]) {
|
|
$fields[] = $this->parseKey($key);
|
|
$values[] = $val[1];
|
|
} elseif (is_null($val)) {
|
|
$fields[] = $this->parseKey($key);
|
|
$values[] = 'NULL';
|
|
} elseif (is_scalar($val)) {
|
|
// 过滤非标量数据
|
|
$fields[] = $this->parseKey($key);
|
|
if (0 === strpos($val, ':') && in_array($val, array_keys($this->bind))) {
|
|
$values[] = $val;
|
|
} else {
|
|
$name = count($this->bind);
|
|
$values[] = ':' . $key . '_' . $name;
|
|
$this->bindParam($key . '_' . $name, $val);
|
|
}
|
|
}
|
|
}
|
|
// 兼容数字传入方式
|
|
$replace = (is_numeric($replace) && $replace > 0) ? true : $replace;
|
|
$sql = (true === $replace ? 'REPLACE' : 'INSERT') . ' INTO ' . $this->parseTable($options['table']) . ' (' . implode(',', $fields) . ') VALUES (' . implode(',', $values) . ')' . $this->parseDuplicate($replace);
|
|
$sql .= $this->parseComment(!empty($options['comment']) ? $options['comment'] : '');
|
|
return $this->execute($sql, !empty($options['fetch_sql']) ? true : false);
|
|
}
|
|
|
|
/**
|
|
* 批量插入记录
|
|
* @access public
|
|
* @param mixed $dataSet 数据集
|
|
* @param array $options 参数表达式
|
|
* @param boolean $replace 是否replace
|
|
* @return false | integer
|
|
*/
|
|
public function insertAll($dataSet, $options = array(), $replace = false)
|
|
{
|
|
$values = array();
|
|
$this->model = $options['model'];
|
|
if (!is_array($dataSet[0])) {
|
|
return false;
|
|
}
|
|
|
|
$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
|
|
$fields = array_map(array($this, 'parseKey'), array_keys($dataSet[0]));
|
|
foreach ($dataSet as $data) {
|
|
$value = array();
|
|
foreach ($data as $key => $val) {
|
|
if (is_array($val) && 'exp' == $val[0]) {
|
|
$value[] = $val[1];
|
|
} elseif (is_null($val)) {
|
|
$value[] = 'NULL';
|
|
} elseif (is_scalar($val)) {
|
|
if (0 === strpos($val, ':') && in_array($val, array_keys($this->bind))) {
|
|
$value[] = $val;
|
|
} else {
|
|
$name = count($this->bind);
|
|
$value[] = ':' . $key . '_' . $name;
|
|
$this->bindParam($key . '_' . $name, $val);
|
|
}
|
|
}
|
|
}
|
|
$values[] = 'SELECT ' . implode(',', $value);
|
|
}
|
|
$sql = 'INSERT INTO ' . $this->parseTable($options['table']) . ' (' . implode(',', $fields) . ') ' . implode(' UNION ALL ', $values);
|
|
$sql .= $this->parseComment(!empty($options['comment']) ? $options['comment'] : '');
|
|
return $this->execute($sql, !empty($options['fetch_sql']) ? true : false);
|
|
}
|
|
|
|
/**
|
|
* 通过Select方式插入记录
|
|
* @access public
|
|
* @param string $fields 要插入的数据表字段名
|
|
* @param string $table 要插入的数据表名
|
|
* @param array $option 查询数据参数
|
|
* @return false | integer
|
|
*/
|
|
public function selectInsert($fields, $table, $options = array())
|
|
{
|
|
$this->model = $options['model'];
|
|
$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
|
|
if (is_string($fields)) {
|
|
$fields = explode(',', $fields);
|
|
}
|
|
|
|
$fields = array_map(array($this, 'parseKey'), $fields);
|
|
$sql = 'INSERT INTO ' . $this->parseTable($table) . ' (' . implode(',', $fields) . ') ';
|
|
$sql .= $this->buildSelectSql($options);
|
|
return $this->execute($sql, !empty($options['fetch_sql']) ? true : false);
|
|
}
|
|
|
|
/**
|
|
* 更新记录
|
|
* @access public
|
|
* @param mixed $data 数据
|
|
* @param array $options 表达式
|
|
* @return false | integer
|
|
*/
|
|
public function update($data, $options)
|
|
{
|
|
$this->model = $options['model'];
|
|
$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
|
|
$table = $this->parseTable($options['table']);
|
|
$sql = 'UPDATE ' . $table . $this->parseSet($data);
|
|
if (strpos($table, ',')) {
|
|
// 多表更新支持JOIN操作
|
|
$sql .= $this->parseJoin(!empty($options['join']) ? $options['join'] : '');
|
|
}
|
|
$sql .= $this->parseWhere(!empty($options['where']) ? $options['where'] : '');
|
|
if (!strpos($table, ',')) {
|
|
// 单表更新支持order和lmit
|
|
$sql .= $this->parseOrder(!empty($options['order']) ? $options['order'] : '')
|
|
. $this->parseLimit(!empty($options['limit']) ? $options['limit'] : '');
|
|
}
|
|
$sql .= $this->parseComment(!empty($options['comment']) ? $options['comment'] : '');
|
|
return $this->execute($sql, !empty($options['fetch_sql']) ? true : false);
|
|
}
|
|
|
|
/**
|
|
* 删除记录
|
|
* @access public
|
|
* @param array $options 表达式
|
|
* @return false | integer
|
|
*/
|
|
public function delete($options = array())
|
|
{
|
|
$this->model = $options['model'];
|
|
$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
|
|
$table = $this->parseTable($options['table']);
|
|
$sql = 'DELETE FROM ' . $table;
|
|
if (strpos($table, ',')) {
|
|
// 多表删除支持USING和JOIN操作
|
|
if (!empty($options['using'])) {
|
|
$sql .= ' USING ' . $this->parseTable($options['using']) . ' ';
|
|
}
|
|
$sql .= $this->parseJoin(!empty($options['join']) ? $options['join'] : '');
|
|
}
|
|
$sql .= $this->parseWhere(!empty($options['where']) ? $options['where'] : '');
|
|
if (!strpos($table, ',')) {
|
|
// 单表删除支持order和limit
|
|
$sql .= $this->parseOrder(!empty($options['order']) ? $options['order'] : '')
|
|
. $this->parseLimit(!empty($options['limit']) ? $options['limit'] : '');
|
|
}
|
|
$sql .= $this->parseComment(!empty($options['comment']) ? $options['comment'] : '');
|
|
return $this->execute($sql, !empty($options['fetch_sql']) ? true : false);
|
|
}
|
|
|
|
/**
|
|
* 查找记录
|
|
* @access public
|
|
* @param array $options 表达式
|
|
* @return mixed
|
|
*/
|
|
public function select($options = array())
|
|
{
|
|
$this->model = $options['model'];
|
|
$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
|
|
$sql = $this->buildSelectSql($options);
|
|
$result = $this->query($sql, !empty($options['fetch_sql']) ? true : false, !empty($options['master']) ? true : false);
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* 生成查询SQL
|
|
* @access public
|
|
* @param array $options 表达式
|
|
* @return string
|
|
*/
|
|
public function buildSelectSql($options = array())
|
|
{
|
|
if (isset($options['page'])) {
|
|
// 根据页数计算limit
|
|
list($page, $listRows) = $options['page'];
|
|
$page = $page > 0 ? $page : 1;
|
|
$listRows = $listRows > 0 ? $listRows : (is_numeric($options['limit']) ? $options['limit'] : 20);
|
|
$offset = $listRows * ($page - 1);
|
|
$options['limit'] = $offset . ',' . $listRows;
|
|
}
|
|
$sql = $this->parseSql($this->selectSql, $options);
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* 替换SQL语句中表达式
|
|
* @access public
|
|
* @param array $options 表达式
|
|
* @return string
|
|
*/
|
|
public function parseSql($sql, $options = array())
|
|
{
|
|
$sql = str_replace(
|
|
array('%TABLE%', '%DISTINCT%', '%FIELD%', '%JOIN%', '%WHERE%', '%GROUP%', '%HAVING%', '%ORDER%', '%LIMIT%', '%UNION%', '%LOCK%', '%COMMENT%', '%FORCE%'),
|
|
array(
|
|
$this->parseTable($options['table']),
|
|
$this->parseDistinct(isset($options['distinct']) ? $options['distinct'] : false),
|
|
$this->parseField(!empty($options['field']) ? $options['field'] : '*'),
|
|
$this->parseJoin(!empty($options['join']) ? $options['join'] : ''),
|
|
$this->parseWhere(!empty($options['where']) ? $options['where'] : ''),
|
|
$this->parseGroup(!empty($options['group']) ? $options['group'] : ''),
|
|
$this->parseHaving(!empty($options['having']) ? $options['having'] : ''),
|
|
$this->parseOrder(!empty($options['order']) ? $options['order'] : ''),
|
|
$this->parseLimit(!empty($options['limit']) ? $options['limit'] : ''),
|
|
$this->parseUnion(!empty($options['union']) ? $options['union'] : ''),
|
|
$this->parseLock(isset($options['lock']) ? $options['lock'] : false),
|
|
$this->parseComment(!empty($options['comment']) ? $options['comment'] : ''),
|
|
$this->parseForce(!empty($options['force']) ? $options['force'] : ''),
|
|
), $sql);
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* 获取最近一次查询的sql语句
|
|
* @param string $model 模型名
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function getLastSql($model = '')
|
|
{
|
|
return $model ? $this->modelSql[$model] : $this->queryStr;
|
|
}
|
|
|
|
/**
|
|
* 获取最近插入的ID
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function getLastInsID()
|
|
{
|
|
return $this->lastInsID;
|
|
}
|
|
|
|
/**
|
|
* 获取最近的错误信息
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function getError()
|
|
{
|
|
return $this->error;
|
|
}
|
|
|
|
/**
|
|
* SQL指令安全过滤
|
|
* @access public
|
|
* @param string $str SQL字符串
|
|
* @return string
|
|
*/
|
|
public function escapeString($str)
|
|
{
|
|
return addslashes($str);
|
|
}
|
|
|
|
/**
|
|
* 设置当前操作模型
|
|
* @access public
|
|
* @param string $model 模型名
|
|
* @return void
|
|
*/
|
|
public function setModel($model)
|
|
{
|
|
$this->model = $model;
|
|
}
|
|
|
|
/**
|
|
* 数据库调试 记录当前SQL
|
|
* @access protected
|
|
* @param boolean $start 调试开始标记 true 开始 false 结束
|
|
*/
|
|
protected function debug($start)
|
|
{
|
|
if ($this->config['debug']) {
|
|
// 开启数据库调试模式
|
|
if ($start) {
|
|
G('queryStartTime');
|
|
} else {
|
|
$this->modelSql[$this->model] = $this->queryStr;
|
|
//$this->model = '_think_';
|
|
// 记录操作结束时间
|
|
G('queryEndTime');
|
|
trace($this->queryStr . ' [ RunTime:' . G('queryStartTime', 'queryEndTime') . 's ]', '', 'SQL');
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 初始化数据库连接
|
|
* @access protected
|
|
* @param boolean $master 主服务器
|
|
* @return void
|
|
*/
|
|
protected function initConnect($master = true)
|
|
{
|
|
// 开启事物时用同一个连接进行操作
|
|
if ($this->transPDO) {
|
|
return $this->transPDO;
|
|
}
|
|
|
|
if (!empty($this->config['deploy']))
|
|
// 采用分布式数据库
|
|
{
|
|
$this->_linkID = $this->multiConnect($master);
|
|
} else
|
|
// 默认单数据库
|
|
if (!$this->_linkID) {
|
|
$this->_linkID = $this->connect();
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* 连接分布式服务器
|
|
* @access protected
|
|
* @param boolean $master 主服务器
|
|
* @return void
|
|
*/
|
|
protected function multiConnect($master = false)
|
|
{
|
|
// 分布式数据库配置解析
|
|
$_config['username'] = explode(',', $this->config['username']);
|
|
$_config['password'] = explode(',', $this->config['password']);
|
|
$_config['hostname'] = explode(',', $this->config['hostname']);
|
|
$_config['hostport'] = explode(',', $this->config['hostport']);
|
|
$_config['database'] = explode(',', $this->config['database']);
|
|
$_config['dsn'] = explode(',', $this->config['dsn']);
|
|
$_config['charset'] = explode(',', $this->config['charset']);
|
|
|
|
$m = floor(mt_rand(0, $this->config['master_num'] - 1));
|
|
// 数据库读写是否分离
|
|
if ($this->config['rw_separate']) {
|
|
// 主从式采用读写分离
|
|
if ($master)
|
|
// 主服务器写入
|
|
{
|
|
$r = $m;
|
|
} else {
|
|
if (is_numeric($this->config['slave_no'])) {
|
|
// 指定服务器读
|
|
$r = $this->config['slave_no'];
|
|
} else {
|
|
// 读操作连接从服务器
|
|
$r = floor(mt_rand($this->config['master_num'], count($_config['hostname']) - 1)); // 每次随机连接的数据库
|
|
}
|
|
}
|
|
} else {
|
|
// 读写操作不区分服务器
|
|
$r = floor(mt_rand(0, count($_config['hostname']) - 1)); // 每次随机连接的数据库
|
|
}
|
|
|
|
if ($m != $r) {
|
|
$db_master = array(
|
|
'username' => isset($_config['username'][$m]) ? $_config['username'][$m] : $_config['username'][0],
|
|
'password' => isset($_config['password'][$m]) ? $_config['password'][$m] : $_config['password'][0],
|
|
'hostname' => isset($_config['hostname'][$m]) ? $_config['hostname'][$m] : $_config['hostname'][0],
|
|
'hostport' => isset($_config['hostport'][$m]) ? $_config['hostport'][$m] : $_config['hostport'][0],
|
|
'database' => isset($_config['database'][$m]) ? $_config['database'][$m] : $_config['database'][0],
|
|
'dsn' => isset($_config['dsn'][$m]) ? $_config['dsn'][$m] : $_config['dsn'][0],
|
|
'charset' => isset($_config['charset'][$m]) ? $_config['charset'][$m] : $_config['charset'][0],
|
|
);
|
|
}
|
|
$db_config = array(
|
|
'username' => isset($_config['username'][$r]) ? $_config['username'][$r] : $_config['username'][0],
|
|
'password' => isset($_config['password'][$r]) ? $_config['password'][$r] : $_config['password'][0],
|
|
'hostname' => isset($_config['hostname'][$r]) ? $_config['hostname'][$r] : $_config['hostname'][0],
|
|
'hostport' => isset($_config['hostport'][$r]) ? $_config['hostport'][$r] : $_config['hostport'][0],
|
|
'database' => isset($_config['database'][$r]) ? $_config['database'][$r] : $_config['database'][0],
|
|
'dsn' => isset($_config['dsn'][$r]) ? $_config['dsn'][$r] : $_config['dsn'][0],
|
|
'charset' => isset($_config['charset'][$r]) ? $_config['charset'][$r] : $_config['charset'][0],
|
|
);
|
|
return $this->connect($db_config, $r, $r == $m ? false : $db_master);
|
|
}
|
|
|
|
/**
|
|
* 析构方法
|
|
* @access public
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
// 释放查询
|
|
if ($this->PDOStatement) {
|
|
$this->free();
|
|
}
|
|
// 关闭连接
|
|
$this->close();
|
|
}
|
|
}
|