添加后台代理代码

codes/agent/game/api/lib/phprs/ezsql/README.md

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+# ezsql
+An an easy-to-use SQL builder.
+
+## HOW TO USE
+
+    $db = new \PDO($dsn, $username, $passwd);
+    
+### SELECT
+
+    $res = Sql::select('a, b')
+       ->from('table')
+       ->leftJoin('table1')->on('table.id=table1.id')
+       ->where('a=?',1)
+       ->groupBy('b')->having('sum(b)=?', 2)
+       ->orderBy('c', Sql::$ORDER_BY_ASC)
+       ->limit(0,1)
+       ->forUpdate()->of('d')
+       ->get($db);
+### UPDATE
+    
+    $rows = Sql::update('table')
+       ->set('a', 1)
+       ->where('b=?', 2)
+       ->orderBy('c', Sql::$ORDER_BY_ASC)
+       ->limit(1)
+       ->exec($db)
+       ->rows
+       
+### INSERT
+
+    $newId = Sql::insertInto('table')
+       ->values(['a'=>1])
+       ->exec($db)
+       ->lastInsertId()
+       
+### DELETE
+   
+    $rows = Sql::deleteFrom('table')
+       ->where('b=?', 2)
+       ->orderBy('c', Sql::$ORDER_BY_ASC)
+       ->limit(1)
+       ->exec($db)
+       ->rows
+