mirror of
https://gitee.com/fastadminnet/framework.git
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1019 lines
30 KiB
PHP
1019 lines
30 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2016 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\Cache;
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use think\Config;
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use think\Db;
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use think\db\Query;
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use think\Debug;
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use think\Exception;
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use think\exception\DbBindParamException;
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use think\exception\PDOException;
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use think\Loader;
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use think\Log;
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abstract class Connection
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{
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// PDO操作实例
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protected $PDOStatement = null;
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// 当前操作的数据表名
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protected $table = '';
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// 当前操作的数据对象名
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protected $name = '';
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// 当前SQL指令
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protected $queryStr = '';
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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 $links = [];
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// 当前连接ID
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protected $linkID = null;
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// 查询参数
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protected $options = [];
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// 查询结果类型
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protected $fetchType = PDO::FETCH_ASSOC;
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// 监听回调
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protected static $event = [];
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// 数据库连接参数配置
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protected $config = [
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// 数据库类型
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'type' => '',
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// 服务器地址
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'hostname' => '',
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// 数据库名
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'database' => '',
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// 用户名
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'username' => '',
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// 密码
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'password' => '',
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// 端口
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'hostport' => '',
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'dsn' => '',
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// 数据库连接参数
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'params' => [],
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// 数据库编码默认采用utf8
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'charset' => 'utf8',
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// 数据库表前缀
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'prefix' => '',
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// 数据库调试模式
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'debug' => false,
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// 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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'deploy' => 0,
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// 数据库读写是否分离 主从式有效
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'rw_separate' => false,
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// 读写分离后 主服务器数量
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'master_num' => 1,
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// 指定从服务器序号
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'slave_no' => '',
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// like字段自动替换为%%包裹
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'like_fields' => '',
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// 是否严格检查字段是否存在
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'fields_strict' => true,
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];
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// PDO连接参数
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protected $params = [
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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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PDO::ATTR_EMULATE_PREPARES => false,
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];
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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->params = $this->config['params'] + $this->params;
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}
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}
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$this->query = new Query($this);
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}
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/**
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* 调用Query类的查询方法
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* @access public
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* @param string $method 方法名称
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* @param array $args 调用参数
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* @return mixed
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*/
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public function __call($method, $args)
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{
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return call_user_func_array([$this->query, $method], $args);
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}
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/**
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* 指定当前数据表
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* @access public
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*/
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public function setTable($table)
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{
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$this->table = $table;
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}
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public function getAttribute($config)
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{
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return $this->config[$config];
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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->links[$linkNum])) {
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if (empty($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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$this->links[$linkNum] = new PDO($config['dsn'], $config['username'], $config['password'], $this->params);
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// 记录数据库连接信息
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APP_DEBUG && Log::record('[ DB ] CONNECT: ' . $config['dsn'], 'info');
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} catch (\PDOException $e) {
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if ($autoConnection) {
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Log::record($e->getMessage(), 'error');
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return $this->connect($autoConnection, $linkNum);
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} else {
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throw new Exception($e->getMessage());
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}
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}
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}
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return $this->links[$linkNum];
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}
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public function getDriverName()
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{
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if ($this->linkID) {
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return $this->linkID->getAttribute(PDO::ATTR_DRIVER_NAME);
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} else {
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return $this->config['type'];
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}
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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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$this->PDOStatement = null;
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}
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/**
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* 获取PDO对象
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* @access public
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*/
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public function getPdo()
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{
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if (!$this->linkID) {
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return false;
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} else {
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return $this->linkID;
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}
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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 $sql sql指令
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* @param array $bind 参数绑定
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* @param boolean $fetch 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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* @param bool $returnPdo 是否返回 PDOStatement 对象
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* @return mixed
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*/
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public function query($sql, $bind = [], $fetch = false, $master = false, $returnPdo = false)
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{
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$this->initConnect($master);
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if (!$this->linkID) {
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return false;
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}
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// 根据参数绑定组装最终的SQL语句
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$this->queryStr = $this->getBindSql($sql, $bind);
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if ($fetch) {
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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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$this->free();
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}
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Db::$queryTimes++;
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try {
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// 调试开始
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$this->debug(true);
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// 预处理
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$this->PDOStatement = $this->linkID->prepare($sql);
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// 参数绑定
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$this->bindValue($bind);
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// 执行查询
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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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return $returnPdo ? $this->PDOStatement : $this->getResult();
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} catch (\PDOException $e) {
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throw new PDOException($e, $this->config, $this->queryStr);
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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 $sql sql指令
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* @param array $bind 参数绑定
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* @param boolean $fetch 不执行只是获取SQL
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* @return integer
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*/
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public function execute($sql, $bind = [], $fetch = false)
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{
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$this->initConnect(true);
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if (!$this->linkID) {
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return false;
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}
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// 根据参数绑定组装最终的SQL语句
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$this->queryStr = $this->getBindSql($sql, $bind);
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if ($fetch) {
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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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$this->free();
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}
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Db::$executeTimes++;
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try {
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// 调试开始
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$this->debug(true);
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// 预处理
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$this->PDOStatement = $this->linkID->prepare($sql);
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// 参数绑定操作
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$this->bindValue($bind);
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// 执行语句
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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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$this->numRows = $this->PDOStatement->rowCount();
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if (preg_match("/^\s*(INSERT\s+INTO|REPLACE\s+INTO)\s+/i", $sql)) {
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$this->lastInsID = $this->linkID->lastInsertId();
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}
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return $this->numRows;
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} catch (\PDOException $e) {
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throw new PDOException($e, $this->config, $this->queryStr);
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}
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}
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/**
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* 组装最终的SQL语句 便于调试
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* @access public
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* @param string $sql 带参数绑定的sql语句
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* @param array $bind 参数绑定列表
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* @return string
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*/
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protected function getBindSql($sql, array $bind = [])
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{
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if ($bind) {
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foreach ($bind as $key => $val) {
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$val = $this->quote(is_array($val) ? $val[0] : $val);
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// 判断占位符
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$sql = is_numeric($key) ?
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substr_replace($sql, $val, strpos($sql, '?'), 1) :
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str_replace([':' . $key . ')', ':' . $key . ' '], [$val . ')', $val . ' '], $sql . ' ');
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}
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}
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return $sql;
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}
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/**
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* 参数绑定
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* 支持 ['name'=>'value','id'=>123] 对应命名占位符
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* 或者 ['value',123] 对应问号占位符
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* @access public
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* @param array $bind 要绑定的参数列表
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* @return void
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* @throws \think\Exception
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*/
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protected function bindValue(array $bind = [])
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{
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foreach ($bind as $key => $val) {
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// 占位符
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$param = is_numeric($key) ? $key + 1 : ':' . $key;
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if (is_array($val)) {
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$result = $this->PDOStatement->bindValue($param, $val[0], $val[1]);
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} else {
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$result = $this->PDOStatement->bindValue($param, $val);
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}
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if (!$result) {
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throw new DbBindParamException(
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"Error occurred when binding parameters '{$param}'",
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$this->config,
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$this->queryStr,
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$bind
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);
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}
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}
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}
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/**
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* 获得数据集
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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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$result = $this->PDOStatement->fetchAll($this->fetchType);
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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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* 执行数据库事务
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* @access public
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* @param callable $callback 数据操作方法回调
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* @return void
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*/
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public function transaction($callback)
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{
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$this->startTrans();
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try {
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if (is_callable($callback)) {
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call_user_func_array($callback, []);
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}
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$this->commit();
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} catch (\PDOException $e) {
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$this->rollback();
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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 == $this->transTimes) {
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$this->linkID->beginTransaction();
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}
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$this->transTimes++;
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return;
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}
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/**
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* 用于非自动提交状态下面的查询提交
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* @access public
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* @return boolen
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*/
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public function commit()
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{
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if ($this->transTimes > 0) {
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try {
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$this->linkID->commit();
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$this->transTimes = 0;
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} catch (\PDOException $e) {
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throw new PDOException($e, $this->config, $this->queryStr);
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}
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}
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return true;
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}
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/**
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* 事务回滚
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* @access public
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* @return boolen
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*/
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public function rollback()
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{
|
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if ($this->transTimes > 0) {
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try {
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$this->linkID->rollback();
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$this->transTimes = 0;
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} catch (\PDOException $e) {
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throw new PDOException($e, $this->config, $this->queryStr);
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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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* 批处理执行SQL语句
|
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* 批处理的指令都认为是execute操作
|
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* @access public
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* @param array $sql SQL批处理指令
|
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* @return boolean
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*/
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public function batchQuery($sql = [])
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{
|
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if (!is_array($sql)) {
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return false;
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}
|
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// 自动启动事务支持
|
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$this->startTrans();
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try {
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foreach ($sql as $_sql) {
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$result = $this->execute($_sql);
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}
|
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// 提交事务
|
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$this->commit();
|
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} catch (\PDOException $e) {
|
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$this->rollback();
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return false;
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}
|
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return true;
|
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}
|
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|
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/**
|
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* 将SQL语句中的__TABLE_NAME__字符串替换成带前缀的表名（小写）
|
||
* @access public
|
||
* @param string $sql sql语句
|
||
* @return string
|
||
*/
|
||
public function parseSqlTable($sql)
|
||
{
|
||
if (false !== strpos($sql, '__')) {
|
||
$prefix = $this->tablePrefix;
|
||
$sql = preg_replace_callback("/__([A-Z0-9_-]+)__/sU", function ($match) use ($prefix) {
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return $prefix . strtolower($match[1]);
|
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}, $sql);
|
||
}
|
||
return $sql;
|
||
}
|
||
|
||
/**
|
||
* 得到某个字段的值
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @return mixed
|
||
*/
|
||
public function value($field)
|
||
{
|
||
// 返回数据个数
|
||
$pdo = $this->field($field)->fetchPdo(true)->find();
|
||
return $pdo->fetchColumn();
|
||
}
|
||
|
||
/**
|
||
* 得到某个列的数组
|
||
* @access public
|
||
* @param string $field 字段名 多个字段用逗号分隔
|
||
* @param string $key 索引
|
||
* @return array
|
||
*/
|
||
public function column($field, $key = '')
|
||
{
|
||
$key = $key ? $key . ',' : '';
|
||
$pdo = $this->field($key . $field)->fetchPdo(true)->select();
|
||
if (1 == $pdo->columnCount()) {
|
||
return $pdo->fetchAll(PDO::FETCH_COLUMN);
|
||
}
|
||
$result = $pdo->fetchAll(PDO::FETCH_ASSOC);
|
||
$fields = array_keys($result[0]);
|
||
$count = count($fields);
|
||
$key1 = array_shift($fields);
|
||
$key2 = $fields ? array_shift($fields) : '';
|
||
foreach ($result as $val) {
|
||
if ($count > 2) {
|
||
$array[$val[$key1]] = $val;
|
||
} elseif (2 == $count) {
|
||
$array[$val[$key1]] = $val[$key2];
|
||
}
|
||
}
|
||
return $array;
|
||
}
|
||
|
||
/**
|
||
* COUNT查询
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @return integer
|
||
*/
|
||
public function count($field = '*')
|
||
{
|
||
return $this->value('COUNT(' . $field . ') AS tp_count');
|
||
}
|
||
|
||
/**
|
||
* SUM查询
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @return integer
|
||
*/
|
||
public function sum($field = '*')
|
||
{
|
||
return $this->value('SUM(' . $field . ') AS tp_sum');
|
||
}
|
||
|
||
/**
|
||
* MIN查询
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @return integer
|
||
*/
|
||
public function min($field = '*')
|
||
{
|
||
return $this->value('MIN(' . $field . ') AS tp_min');
|
||
}
|
||
|
||
/**
|
||
* MAX查询
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @return integer
|
||
*/
|
||
public function max($field = '*')
|
||
{
|
||
return $this->value('MAX(' . $field . ') AS tp_max');
|
||
}
|
||
|
||
/**
|
||
* AVG查询
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @return integer
|
||
*/
|
||
public function avg($field = '*')
|
||
{
|
||
return $this->value('AVG(' . $field . ') AS tp_avg');
|
||
}
|
||
|
||
/**
|
||
* 设置记录的某个字段值
|
||
* 支持使用数据库字段和方法
|
||
* @access public
|
||
* @param string|array $field 字段名
|
||
* @param string $value 字段值
|
||
* @return integer
|
||
*/
|
||
public function setField($field, $value = '')
|
||
{
|
||
if (is_array($field)) {
|
||
$data = $field;
|
||
} else {
|
||
$data[$field] = $value;
|
||
}
|
||
return $this->update($data);
|
||
}
|
||
|
||
/**
|
||
* 字段值(延迟)增长
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @param integer $step 增长值
|
||
* @param integer $lazyTime 延时时间(s)
|
||
* @return integer|true
|
||
* @throws \think\Exception
|
||
*/
|
||
public function setInc($field, $step = 1, $lazyTime = 0)
|
||
{
|
||
$condition = !empty($this->options['where']) ? $this->options['where'] : [];
|
||
if (empty($condition)) {
|
||
// 没有条件不做任何更新
|
||
throw new Exception('no data to update');
|
||
}
|
||
if ($lazyTime > 0) {
|
||
// 延迟写入
|
||
$guid = md5($this->name . '_' . $field . '_' . serialize($condition));
|
||
$step = $this->lazyWrite($guid, $step, $lazyTime);
|
||
if (empty($step)) {
|
||
return true; // 等待下次写入
|
||
}
|
||
}
|
||
return $this->setField($field, ['exp', $field . '+' . $step]);
|
||
}
|
||
|
||
/**
|
||
* 字段值（延迟）减少
|
||
* @access public
|
||
* @param string $field 字段名
|
||
* @param integer $step 减少值
|
||
* @param integer $lazyTime 延时时间(s)
|
||
* @return integer|true
|
||
* @throws \think\Exception
|
||
*/
|
||
public function setDec($field, $step = 1, $lazyTime = 0)
|
||
{
|
||
$condition = !empty($this->options['where']) ? $this->options['where'] : [];
|
||
if (empty($condition)) {
|
||
// 没有条件不做任何更新
|
||
throw new Exception('no data to update');
|
||
}
|
||
if ($lazyTime > 0) {
|
||
// 延迟写入
|
||
$guid = md5($this->name . '_' . $field . '_' . serialize($condition));
|
||
$step = $this->lazyWrite($guid, -$step, $lazyTime);
|
||
if (empty($step)) {
|
||
return true; // 等待下次写入
|
||
}
|
||
}
|
||
return $this->setField($field, ['exp', $field . '-' . $step]);
|
||
}
|
||
|
||
/**
|
||
* 延时更新检查 返回false表示需要延时
|
||
* 否则返回实际写入的数值
|
||
* @access public
|
||
* @param string $guid 写入标识
|
||
* @param integer $step 写入步进值
|
||
* @param integer $lazyTime 延时时间(s)
|
||
* @return false|integer
|
||
*/
|
||
protected function lazyWrite($guid, $step, $lazyTime)
|
||
{
|
||
if (false !== ($value = Cache::get($guid))) {
|
||
// 存在缓存写入数据
|
||
if (NOW_TIME > Cache::get($guid . '_time') + $lazyTime) {
|
||
// 延时更新时间到了，删除缓存数据 并实际写入数据库
|
||
Cache::rm($guid);
|
||
Cache::rm($guid . '_time');
|
||
return $value + $step;
|
||
} else {
|
||
// 追加数据到缓存
|
||
Cache::set($guid, $value + $step, 0);
|
||
return false;
|
||
}
|
||
} else {
|
||
// 没有缓存数据
|
||
Cache::set($guid, $step, 0);
|
||
// 计时开始
|
||
Cache::set($guid . '_time', NOW_TIME, 0);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 得到完整的数据表名
|
||
* @access public
|
||
* @return string
|
||
*/
|
||
public function getTableName()
|
||
{
|
||
if (!$this->table) {
|
||
$tableName = $this->config['prefix'];
|
||
$tableName .= Loader::parseName($this->name);
|
||
} else {
|
||
$tableName = $this->table;
|
||
}
|
||
return $tableName;
|
||
}
|
||
|
||
/**
|
||
* 设置当前name
|
||
* @access public
|
||
* @param string $name
|
||
* @return $this
|
||
*/
|
||
public function name($name)
|
||
{
|
||
$this->name = $name;
|
||
return $this;
|
||
}
|
||
|
||
/**
|
||
* 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 $execute ? Db::$queryTimes + Db::$executeTimes : Db::$queryTimes;
|
||
}
|
||
|
||
/**
|
||
* 获得执行次数
|
||
* @access public
|
||
* @return integer
|
||
*/
|
||
public function getExecuteTimes()
|
||
{
|
||
return Db::$executeTimes;
|
||
}
|
||
|
||
/**
|
||
* 关闭数据库
|
||
* @access public
|
||
*/
|
||
public function close()
|
||
{
|
||
$this->linkID = null;
|
||
}
|
||
|
||
/**
|
||
* 获取数据表信息
|
||
* @access public
|
||
* @param string $fetch 获取信息类型 包括 fields type bind pk
|
||
* @param string $tableName 数据表名 留空自动获取
|
||
* @return mixed
|
||
*/
|
||
public function getTableInfo($tableName = '', $fetch = '')
|
||
{
|
||
static $_info = [];
|
||
if (!$tableName) {
|
||
$tableName = $this->getTableName();
|
||
}
|
||
if (is_array($tableName)) {
|
||
$tableName = key($tableName) ?: current($tableName);
|
||
}
|
||
if (strpos($tableName, ',')) {
|
||
// 多表不获取字段信息
|
||
return false;
|
||
}
|
||
$guid = md5($tableName);
|
||
if (!isset($_info[$guid])) {
|
||
$info = $this->getFields($tableName);
|
||
// 字段大小写转换
|
||
switch ($this->params[PDO::ATTR_CASE]) {
|
||
case PDO::CASE_LOWER:
|
||
$info = array_change_key_case($info);
|
||
break;
|
||
case PDO::CASE_UPPER:
|
||
$info = array_change_key_case($info, CASE_UPPER);
|
||
break;
|
||
case PDO::CASE_NATURAL:
|
||
default:
|
||
// 不做转换
|
||
}
|
||
|
||
$fields = array_keys($info);
|
||
$bind = $type = [];
|
||
foreach ($info as $key => $val) {
|
||
// 记录字段类型
|
||
$type[$key] = $val['type'];
|
||
if (preg_match('/(int|double|float|decimal|real|numeric|serial)/is', $val['type'])) {
|
||
$bind[$key] = PDO::PARAM_INT;
|
||
} elseif (preg_match('/bool/is', $val['type'])) {
|
||
$bind[$key] = PDO::PARAM_BOOL;
|
||
} else {
|
||
$bind[$key] = PDO::PARAM_STR;
|
||
}
|
||
if (!empty($val['primary'])) {
|
||
$pk[] = $key;
|
||
}
|
||
}
|
||
if (isset($pk)) {
|
||
// 设置主键
|
||
$pk = count($pk) > 1 ? $pk : $pk[0];
|
||
} else {
|
||
$pk = null;
|
||
}
|
||
$result = ['fields' => $fields, 'type' => $type, 'bind' => $bind, 'pk' => $pk];
|
||
$_info[$guid] = $result;
|
||
}
|
||
return $fetch ? $_info[$guid][$fetch] : $_info[$guid];
|
||
}
|
||
|
||
/**
|
||
* 获取最近一次查询的sql语句
|
||
* @access public
|
||
* @return string
|
||
*/
|
||
public function getLastSql()
|
||
{
|
||
return $this->queryStr;
|
||
}
|
||
|
||
/**
|
||
* 获取最近插入的ID
|
||
* @access public
|
||
* @return string
|
||
*/
|
||
public function getLastInsID()
|
||
{
|
||
return $this->lastInsID;
|
||
}
|
||
|
||
/**
|
||
* 获取最近的错误信息
|
||
* @access public
|
||
* @return string
|
||
*/
|
||
public function getError()
|
||
{
|
||
if ($this->PDOStatement) {
|
||
$error = $this->PDOStatement->errorInfo();
|
||
$error = $error[1] . ':' . $error[2];
|
||
} else {
|
||
$error = '';
|
||
}
|
||
if ('' != $this->queryStr) {
|
||
$error .= "\n [ SQL语句 ] : " . $this->queryStr;
|
||
}
|
||
return $error;
|
||
}
|
||
|
||
/**
|
||
* SQL指令安全过滤
|
||
* @access public
|
||
* @param string $str SQL字符串
|
||
* @return string
|
||
*/
|
||
public function quote($str)
|
||
{
|
||
$this->initConnect();
|
||
return $this->linkID ? $this->linkID->quote($str) : $str;
|
||
}
|
||
|
||
/**
|
||
* 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 (!empty($this->config['debug'])) {
|
||
// 开启数据库调试模式
|
||
if ($start) {
|
||
Debug::remark('queryStartTime', 'time');
|
||
} else {
|
||
// 记录操作结束时间
|
||
Debug::remark('queryEndTime', 'time');
|
||
$runtime = Debug::getRangeTime('queryStartTime', 'queryEndTime');
|
||
$log = $this->queryStr . ' [ RunTime:' . $runtime . 's ]';
|
||
$result = [];
|
||
// SQL性能分析
|
||
if (0 === stripos(trim($this->queryStr), 'select')) {
|
||
$result = $this->getExplain($this->queryStr);
|
||
}
|
||
// SQL监听
|
||
$this->trigger($this->queryStr, $runtime, $result);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 监听SQL执行
|
||
* @access public
|
||
* @param callable $callback 回调方法
|
||
* @return void
|
||
*/
|
||
public function listen($callback)
|
||
{
|
||
self::$event[] = $callback;
|
||
}
|
||
|
||
/**
|
||
* 触发SQL事件
|
||
* @access protected
|
||
* @param string $sql SQL语句
|
||
* @param float $runtime SQL运行时间
|
||
* @param mixed $explain SQL分析
|
||
* @return bool
|
||
*/
|
||
protected function trigger($sql, $runtime, $explain = [])
|
||
{
|
||
if (!empty(self::$event)) {
|
||
foreach (self::$event as $callback) {
|
||
if (is_callable($callback)) {
|
||
call_user_func_array($callback, [$sql, $runtime, $explain]);
|
||
}
|
||
}
|
||
} else {
|
||
// 未注册监听则记录到日志中
|
||
Log::record('[ SQL ] ' . $this->queryStr . ' [ RunTime:' . $runtime . 's ]', 'sql');
|
||
if (!empty($explain)) {
|
||
Log::record('[ EXPLAIN : ' . var_export($explain, true) . ' ]', '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)
|
||
{
|
||
if (!empty($this->config['deploy'])) {
|
||
// 采用分布式数据库
|
||
$this->linkID = $this->multiConnect($master);
|
||
} elseif (!$this->linkID) {
|
||
// 默认单数据库
|
||
$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) {
|
||
$db_master = [
|
||
'username' => isset($_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],
|
||
];
|
||
}
|
||
$db_config = [
|
||
'username' => isset($_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();
|
||
}
|
||
}
|