From 6e9dc16d359efb754e69c69f9394d12633819e53 Mon Sep 17 00:00:00 2001
From: liuzhaowei55 <liuzhaowei55@gmail.com>
Date: Wed, 16 Dec 2015 11:01:37 +0800
Subject: [PATCH] update thinkphp/base.php
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

修改I函数$default默认值为null ,避免在isset()函数检测不到输入值时将输入值默认为空字符串的问题,
默认值为空字符串的话,逻辑代码需要手动判断输入值是空字符串还是没有传此值.
---
 base.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/base.php b/base.php
index db7295ce..318c46da 100644
--- a/base.php
+++ b/base.php
@@ -69,7 +69,7 @@ function C($name = '', $value = null, $range = '')
 }
 
 // 获取输入数据 支持默认值和过滤
-function I($key, $default = '', $filter = '')
+function I($key, $default = null, $filter = '')
 {
     if (strpos($key, '.')) {
         // 指定参数来源