|
- <?php
- // +----------------------------------------------------------------------
- // | ThinkPHP [ WE CAN DO IT JUST THINK ]
- // +----------------------------------------------------------------------
- // | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
- // +----------------------------------------------------------------------
- // | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
- // +----------------------------------------------------------------------
- // | Author: liu21st <liu21st@gmail.com>
- // +----------------------------------------------------------------------
-
- namespace think;
-
- use think\db\Connection;
- use think\db\Query;
-
- /**
- * Class Db
- * @package think
- * @method Query table(string $table) static 指定数据表(含前缀)
- * @method Query name(string $name) static 指定数据表(不含前缀)
- * @method Query where(mixed $field, string $op = null, mixed $condition = null) static 查询条件
- * @method Query join(mixed $join, mixed $condition = null, string $type = 'INNER') static JOIN查询
- * @method Query union(mixed $union, boolean $all = false) static UNION查询
- * @method Query limit(mixed $offset, integer $length = null) static 查询LIMIT
- * @method Query order(mixed $field, string $order = null) static 查询ORDER
- * @method Query cache(mixed $key = null , integer $expire = null) static 设置查询缓存
- * @method mixed value(string $field) static 获取某个字段的值
- * @method array column(string $field, string $key = '') static 获取某个列的值
- * @method Query view(mixed $join, mixed $field = null, mixed $on = null, string $type = 'INNER') static 视图查询
- * @method mixed find(mixed $data = null) static 查询单个记录
- * @method mixed select(mixed $data = null) static 查询多个记录
- * @method integer insert(array $data, boolean $replace = false, boolean $getLastInsID = false, string $sequence = null) static 插入一条记录
- * @method integer insertGetId(array $data, boolean $replace = false, string $sequence = null) static 插入一条记录并返回自增ID
- * @method integer insertAll(array $dataSet) static 插入多条记录
- * @method integer update(array $data) static 更新记录
- * @method integer delete(mixed $data = null) static 删除记录
- * @method boolean chunk(integer $count, callable $callback, string $column = null) static 分块获取数据
- * @method mixed query(string $sql, array $bind = [], boolean $master = false, bool $pdo = false) static SQL查询
- * @method integer execute(string $sql, array $bind = [], boolean $fetch = false, boolean $getLastInsID = false, string $sequence = null) static SQL执行
- * @method Paginator paginate(integer $listRows = 15, mixed $simple = null, array $config = []) static 分页查询
- * @method mixed transaction(callable $callback) static 执行数据库事务
- * @method void startTrans() static 启动事务
- * @method void commit() static 用于非自动提交状态下面的查询提交
- * @method void rollback() static 事务回滚
- * @method boolean batchQuery(array $sqlArray) static 批处理执行SQL语句
- * @method string quote(string $str) static SQL指令安全过滤
- * @method string getLastInsID($sequence = null) static 获取最近插入的ID
- */
- class Db
- {
- /**
- * @var Connection[] 数据库连接实例
- */
- private static $instance = [];
-
- /**
- * @var int 查询次数
- */
- public static $queryTimes = 0;
-
- /**
- * @var int 执行次数
- */
- public static $executeTimes = 0;
-
- /**
- * 数据库初始化,并取得数据库类实例
- * @access public
- * @param mixed $config 连接配置
- * @param bool|string $name 连接标识 true 强制重新连接
- * @return Connection
- * @throws Exception
- */
- public static function connect($config = [], $name = false)
- {
- if (false === $name) {
- $name = md5(serialize($config));
- }
-
- if (true === $name || !isset(self::$instance[$name])) {
- // 解析连接参数 支持数组和字符串
- $options = self::parseConfig($config);
-
- if (empty($options['type'])) {
- throw new \InvalidArgumentException('Undefined db type');
- }
-
- $class = false !== strpos($options['type'], '\\') ?
- $options['type'] :
- '\\think\\db\\connector\\' . ucwords($options['type']);
-
- // 记录初始化信息
- if (App::$debug) {
- Log::record('[ DB ] INIT ' . $options['type'], 'info');
- }
-
- if (true === $name) {
- $name = md5(serialize($config));
- }
-
- self::$instance[$name] = new $class($options);
- }
-
- return self::$instance[$name];
- }
-
- /**
- * 清除连接实例
- * @access public
- * @return void
- */
- public static function clear()
- {
- self::$instance = [];
- }
-
- /**
- * 数据库连接参数解析
- * @access private
- * @param mixed $config 连接参数
- * @return array
- */
- private static function parseConfig($config)
- {
- if (empty($config)) {
- $config = Config::get('database');
- } elseif (is_string($config) && false === strpos($config, '/')) {
- $config = Config::get($config); // 支持读取配置参数
- }
-
- return is_string($config) ? self::parseDsn($config) : $config;
- }
-
- /**
- * DSN 解析
- * 格式: mysql://username:passwd@localhost:3306/DbName?param1=val1¶m2=val2#utf8
- * @access private
- * @param string $dsnStr 数据库 DSN 字符串解析
- * @return array
- */
- private static function parseDsn($dsnStr)
- {
- $info = parse_url($dsnStr);
-
- if (!$info) {
- return [];
- }
-
- $dsn = [
- 'type' => $info['scheme'],
- 'username' => isset($info['user']) ? $info['user'] : '',
- 'password' => isset($info['pass']) ? $info['pass'] : '',
- 'hostname' => isset($info['host']) ? $info['host'] : '',
- 'hostport' => isset($info['port']) ? $info['port'] : '',
- 'database' => !empty($info['path']) ? ltrim($info['path'], '/') : '',
- 'charset' => isset($info['fragment']) ? $info['fragment'] : 'utf8',
- ];
-
- if (isset($info['query'])) {
- parse_str($info['query'], $dsn['params']);
- } else {
- $dsn['params'] = [];
- }
-
- return $dsn;
- }
-
- /**
- * 调用驱动类的方法
- * @access public
- * @param string $method 方法名
- * @param array $params 参数
- * @return mixed
- */
- public static function __callStatic($method, $params)
- {
- return call_user_func_array([self::connect(), $method], $params);
- }
- }
|