TP4初始版本提交

2026-07-02 13:12:49 +08:00 · 2015-01-16 22:42:51 +08:00
commit 223760b65d
139 changed files with 23425 additions and 0 deletions
--- a/Library/Think/Db.php
+++ b/Library/Think/Db.php
@@ -0,0 +1,97 @@
+<?php
+// +----------------------------------------------------------------------
+// | TOPThink [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2011 http://topthink.com All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
+// +----------------------------------------------------------------------
+// | Author: liu21st <liu21st@gmail.com>
+// +----------------------------------------------------------------------
+
+namespace Think;
+
+/**
+ * ThinkPHP 数据库中间层实现类
+ */
+class Db {
+
+    static private  $instance   =  [];     //  数据库连接实例
+    static private  $_instance  =  null;   //  当前数据库连接实例
+
+    /**
+     * 取得数据库类实例
+     * @static
+     * @access public
+     * @param mixed $config 连接配置
+     * @param boolean $lite 是否lite方式
+     * @return Object 返回数据库驱动类
+     */
+    static public function instance($config=[],$lite=false) {
+        $md5    =   md5(serialize($config));
+        if(!isset(self::$instance[$md5])) {
+            // 解析连接参数 支持数组和字符串
+            $options    =   self::parseConfig($config);
+            // 如果采用lite方式 仅支持原生SQL 包括query和execute方法
+            $class  =   $lite?  'Think\Db\Lite' :   'Think\\Db\\Driver\\'.ucwords($options['type']);
+            self::$instance[$md5]   =   new $class($options);
+        }
+        self::$_instance    =   self::$instance[$md5];
+        return self::$_instance;
+    }
+
+    /**
+     * 数据库连接参数解析
+     * @static
+     * @access private
+     * @param mixed $config
+     * @return array
+     */
+    static private function parseConfig($config){
+        if(empty($config)) {
+            $config =   Config::get('database');
+        }
+        if(is_string($config)) {
+            return self::parseDsn($config);
+        }else{
+            return $config;
+        }
+    }
+
+    /**
+     * DSN解析
+     * 格式： mysql://username:passwd@localhost:3306/DbName?param1=val1&param2=val2#utf8
+     * @static
+     * @access private
+     * @param string $dsnStr
+     * @return array
+     */
+    static private function parseDsn($dsnStr) {
+        if( empty($dsnStr) ){return false;}
+        $info = parse_url($dsnStr);
+        if(!$info) {
+            return false;
+        }
+        $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']) ? $info['port'] : '',
+            'database'  =>  isset($info['path']) ? substr($info['path'],1) : '',
+            'charset'   =>  isset($info['fragment'])?$info['fragment']:'utf8',
+        ];
+        
+        if(isset($info['query'])) {
+            parse_str($info['query'],$dsn['params']);
+        }else{
+            $dsn['params']  =   [];
+        }
+        return $dsn;
+     }
+
+    // 调用驱动类的方法
+	static public function __callStatic($method, $params){
+		return call_user_func_array(array(self::$_instance, $method), $params);
+	}
+}