You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
533 lines
16 KiB
533 lines
16 KiB
<?php
|
|
// +----------------------------------------------------------------------
|
|
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
|
|
// +----------------------------------------------------------------------
|
|
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
|
|
// +----------------------------------------------------------------------
|
|
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
|
|
// +----------------------------------------------------------------------
|
|
// | Author: liu21st <liu21st@gmail.com>
|
|
// +----------------------------------------------------------------------
|
|
|
|
namespace Think\Db;
|
|
|
|
use PDO;
|
|
use Think\Config;
|
|
use Think\Debug;
|
|
|
|
class Lite
|
|
{
|
|
// PDO操作实例
|
|
protected $PDOStatement = null;
|
|
// 当前操作所属的模型名
|
|
protected $model = '_think_';
|
|
// 当前SQL指令
|
|
protected $queryStr = '';
|
|
protected $modelSql = array();
|
|
// 最后插入ID
|
|
protected $lastInsID = null;
|
|
// 返回或者影响记录数
|
|
protected $numRows = 0;
|
|
// 事物操作PDO实例
|
|
protected $transPDO = null;
|
|
// 事务指令数
|
|
protected $transTimes = 0;
|
|
// 错误信息
|
|
protected $error = '';
|
|
// 数据库连接ID 支持多个连接
|
|
protected $linkID = array();
|
|
// 当前连接ID
|
|
protected $_linkID = null;
|
|
// 数据库连接参数配置
|
|
protected $config = array(
|
|
'type' => '', // 数据库类型
|
|
'hostname' => '127.0.0.1', // 服务器地址
|
|
'database' => '', // 数据库名
|
|
'username' => '', // 用户名
|
|
'password' => '', // 密码
|
|
'hostport' => '', // 端口
|
|
'dsn' => '', //
|
|
'params' => array(), // 数据库连接参数
|
|
'charset' => 'utf8', // 数据库编码默认采用utf8
|
|
'prefix' => '', // 数据库表前缀
|
|
'debug' => false, // 数据库调试模式
|
|
'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)
|
|
'rw_separate' => false, // 数据库读写是否分离 主从式有效
|
|
'master_num' => 1, // 读写分离后 主服务器数量
|
|
'slave_no' => '', // 指定从服务器序号
|
|
);
|
|
// 数据库表达式
|
|
protected $comparison = array('eq' => '=', 'neq' => '<>', 'gt' => '>', 'egt' => '>=', 'lt' => '<', 'elt' => '<=', 'notlike' => 'NOT LIKE', 'like' => 'LIKE', 'in' => 'IN', 'notin' => 'NOT IN');
|
|
// 查询表达式
|
|
protected $selectSql = 'SELECT%DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%%LIMIT% %UNION%%COMMENT%';
|
|
// 查询次数
|
|
protected $queryTimes = 0;
|
|
// 执行次数
|
|
protected $executeTimes = 0;
|
|
// PDO连接参数
|
|
protected $options = array(
|
|
PDO::ATTR_CASE => PDO::CASE_LOWER,
|
|
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
|
|
PDO::ATTR_ORACLE_NULLS => PDO::NULL_NATURAL,
|
|
PDO::ATTR_STRINGIFY_FETCHES => false,
|
|
);
|
|
|
|
/**
|
|
* 架构函数 读取数据库配置信息
|
|
* @access public
|
|
* @param array $config 数据库配置数组
|
|
*/
|
|
public function __construct($config = '')
|
|
{
|
|
if (!empty($config)) {
|
|
$this->config = array_merge($this->config, $config);
|
|
if (is_array($this->config['params'])) {
|
|
$this->options += $this->config['params'];
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 连接数据库方法
|
|
* @access public
|
|
*/
|
|
public function connect($config = '', $linkNum = 0)
|
|
{
|
|
if (!isset($this->linkID[$linkNum])) {
|
|
if (empty($config)) {
|
|
$config = $this->config;
|
|
}
|
|
|
|
try {
|
|
if (empty($config['dsn'])) {
|
|
$config['dsn'] = $this->parseDsn($config);
|
|
}
|
|
if (version_compare(PHP_VERSION, '5.3.6', '<=')) {
|
|
//禁用模拟预处理语句
|
|
$this->options[PDO::ATTR_EMULATE_PREPARES] = false;
|
|
}
|
|
$this->linkID[$linkNum] = new PDO($config['dsn'], $config['username'], $config['password'], $this->options);
|
|
} catch (\PDOException $e) {
|
|
E($e->getMessage());
|
|
}
|
|
}
|
|
return $this->linkID[$linkNum];
|
|
}
|
|
|
|
/**
|
|
* 解析pdo连接的dsn信息
|
|
* @access public
|
|
* @param array $config 连接信息
|
|
* @return string
|
|
*/
|
|
protected function parseDsn($config)
|
|
{}
|
|
|
|
/**
|
|
* 释放查询结果
|
|
* @access public
|
|
*/
|
|
public function free()
|
|
{
|
|
$this->PDOStatement = null;
|
|
}
|
|
|
|
/**
|
|
* 执行查询 返回数据集
|
|
* @access public
|
|
* @param string $str sql指令
|
|
* @param array $bind 参数绑定
|
|
* @return mixed
|
|
*/
|
|
public function query($str, $bind = array())
|
|
{
|
|
$this->initConnect(false);
|
|
if (!$this->_linkID) {
|
|
return false;
|
|
}
|
|
|
|
$this->queryStr = $str;
|
|
if (!empty($bind)) {
|
|
$that = $this;
|
|
$this->queryStr = strtr($this->queryStr, array_map(function ($val) use ($that) {return '\'' . $that->escapeString($val) . '\'';}, $bind));
|
|
}
|
|
//释放前次的查询结果
|
|
if (!empty($this->PDOStatement)) {
|
|
$this->free();
|
|
}
|
|
|
|
$this->queryTimes++;
|
|
N('db_query', 1); // 兼容代码
|
|
// 调试开始
|
|
$this->debug(true);
|
|
$this->PDOStatement = $this->_linkID->prepare($str);
|
|
if (false === $this->PDOStatement) {
|
|
E($this->error());
|
|
}
|
|
|
|
foreach ($bind as $key => $val) {
|
|
if (is_array($val)) {
|
|
$this->PDOStatement->bindValue($key, $val[0], $val[1]);
|
|
} else {
|
|
$this->PDOStatement->bindValue($key, $val);
|
|
}
|
|
}
|
|
$result = $this->PDOStatement->execute();
|
|
// 调试结束
|
|
$this->debug(false);
|
|
if (false === $result) {
|
|
$this->error();
|
|
return false;
|
|
} else {
|
|
return $this->getResult();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 执行语句
|
|
* @access public
|
|
* @param string $str sql指令
|
|
* @param array $bind 参数绑定
|
|
* @return integer
|
|
*/
|
|
public function execute($str, $bind = array())
|
|
{
|
|
$this->initConnect(true);
|
|
if (!$this->_linkID) {
|
|
return false;
|
|
}
|
|
|
|
$this->queryStr = $str;
|
|
if (!empty($bind)) {
|
|
$that = $this;
|
|
$this->queryStr = strtr($this->queryStr, array_map(function ($val) use ($that) {return '\'' . $that->escapeString($val) . '\'';}, $bind));
|
|
}
|
|
//释放前次的查询结果
|
|
if (!empty($this->PDOStatement)) {
|
|
$this->free();
|
|
}
|
|
|
|
$this->executeTimes++;
|
|
N('db_write', 1); // 兼容代码
|
|
// 记录开始执行时间
|
|
$this->debug(true);
|
|
$this->PDOStatement = $this->_linkID->prepare($str);
|
|
if (false === $this->PDOStatement) {
|
|
E($this->error());
|
|
}
|
|
foreach ($bind as $key => $val) {
|
|
if (is_array($val)) {
|
|
$this->PDOStatement->bindValue($key, $val[0], $val[1]);
|
|
} else {
|
|
$this->PDOStatement->bindValue($key, $val);
|
|
}
|
|
}
|
|
$result = $this->PDOStatement->execute();
|
|
$this->debug(false);
|
|
if (false === $result) {
|
|
$this->error();
|
|
return false;
|
|
} else {
|
|
$this->numRows = $this->PDOStatement->rowCount();
|
|
if (preg_match("/^\s*(INSERT\s+INTO|REPLACE\s+INTO)\s+/i", $str)) {
|
|
$this->lastInsID = $this->_linkID->lastInsertId();
|
|
}
|
|
return $this->numRows;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 启动事务
|
|
* @access public
|
|
* @return void
|
|
*/
|
|
public function startTrans()
|
|
{
|
|
$this->initConnect(true);
|
|
if (!$this->_linkID) {
|
|
return false;
|
|
}
|
|
|
|
//数据rollback 支持
|
|
if (0 == $this->transTimes) {
|
|
// 记录当前操作PDO
|
|
$this->transPdo = $this->_linkID;
|
|
$this->_linkID->beginTransaction();
|
|
}
|
|
$this->transTimes++;
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* 用于非自动提交状态下面的查询提交
|
|
* @access public
|
|
* @return boolean
|
|
*/
|
|
public function commit()
|
|
{
|
|
if ($this->transTimes == 1) {
|
|
// 由嵌套事物的最外层进行提交
|
|
$result = $this->_linkID->commit();
|
|
$this->transTimes = 0;
|
|
$this->transPdo = null;
|
|
if (!$result) {
|
|
$this->error();
|
|
return false;
|
|
}
|
|
} else {
|
|
$this->transTimes--;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* 事务回滚
|
|
* @access public
|
|
* @return boolean
|
|
*/
|
|
public function rollback()
|
|
{
|
|
if ($this->transTimes > 0) {
|
|
$result = $this->_linkID->rollback();
|
|
$this->transTimes = 0;
|
|
$this->transPdo = null;
|
|
if (!$result) {
|
|
$this->error();
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* 获得所有的查询数据
|
|
* @access private
|
|
* @return array
|
|
*/
|
|
private function getResult()
|
|
{
|
|
//返回数据集
|
|
$result = $this->PDOStatement->fetchAll(PDO::FETCH_ASSOC);
|
|
$this->numRows = count($result);
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* 获得查询次数
|
|
* @access public
|
|
* @param boolean $execute 是否包含所有查询
|
|
* @return integer
|
|
*/
|
|
public function getQueryTimes($execute = false)
|
|
{
|
|
return $execute ? $this->queryTimes + $this->executeTimes : $this->queryTimes;
|
|
}
|
|
|
|
/**
|
|
* 获得执行次数
|
|
* @access public
|
|
* @return integer
|
|
*/
|
|
public function getExecuteTimes()
|
|
{
|
|
return $this->executeTimes;
|
|
}
|
|
|
|
/**
|
|
* 关闭数据库
|
|
* @access public
|
|
*/
|
|
public function close()
|
|
{
|
|
$this->_linkID = null;
|
|
}
|
|
|
|
/**
|
|
* 数据库错误信息
|
|
* 并显示当前的SQL语句
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
public function error()
|
|
{
|
|
if ($this->PDOStatement) {
|
|
$error = $this->PDOStatement->errorInfo();
|
|
$this->error = $error[1] . ':' . $error[2];
|
|
} else {
|
|
$this->error = '';
|
|
}
|
|
if ('' != $this->queryStr) {
|
|
$this->error .= "\n [ SQL语句 ] : " . $this->queryStr;
|
|
}
|
|
// 记录错误日志
|
|
trace($this->error, '', 'ERR');
|
|
if ($this->config['debug']) {
|
|
// 开启数据库调试模式
|
|
E($this->error);
|
|
} else {
|
|
return $this->error;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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(',', $this->config['charset']);
|
|
|
|
// 数据库读写是否分离
|
|
if ($this->config['rw_separate']) {
|
|
// 主从式采用读写分离
|
|
if ($master)
|
|
// 主服务器写入
|
|
{
|
|
$r = floor(mt_rand(0, $this->config['master_num'] - 1));
|
|
} else {
|
|
if (is_numeric($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
|
|
}
|
|
$db_config = array(
|
|
'username' => isset($_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, $r);
|
|
}
|
|
|
|
/**
|
|
* 析构方法
|
|
* @access public
|
|
*/
|
|
public function __destruct()
|
|
{
|
|
// 释放查询
|
|
if ($this->PDOStatement) {
|
|
$this->free();
|
|
}
|
|
// 关闭连接
|
|
$this->close();
|
|
}
|
|
}
|