From 3c0e97767d4b5cf138c3f31d0b1fff011ebc2b2d Mon Sep 17 00:00:00 2001
From: zzpuser <zzpuser@163.com>
Date: Wed, 3 Aug 2016 23:21:27 +0800
Subject: [PATCH] =?UTF-8?q?=E6=94=B9=E8=BF=9B=E8=87=AA=E5=A2=9E=E7=BC=93?=
 =?UTF-8?q?=E5=AD=98?=
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原来的方式在step为负数时会报错，并且在没有这个键值对时不会自动创建。现在的方式，避免了这个两个问题。
---
 library/think/cache/driver/Memcached.php | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/library/think/cache/driver/Memcached.php b/library/think/cache/driver/Memcached.php
index f67ea8f5..c09f4bc8 100644
--- a/library/think/cache/driver/Memcached.php
+++ b/library/think/cache/driver/Memcached.php
@@ -115,7 +115,14 @@ class Memcached
      */
     public function inc($name, $step = 1)
     {
-        return $this->handler->increment($this->options['prefix'] . $name, $step);
+        $oldValue = $this->handler->get($this->options['prefix'] . $name);
+        $value    = $oldValue + $step;
+        $res      = $this->handler->set($this->options['prefix'] . $name, $value);
+        if (!$res) {
+            return false;
+        } else {
+            return $value;
+        }
     }
 
     /**
@@ -129,7 +136,7 @@ class Memcached
     {
         $oldValue = $this->handler->get($this->options['prefix'] . $name);
         $value    = $oldValue - $step;
-        $res      = $this->handler->set($this->options['prefix'] . $name, $oldValue - $step);
+        $res      = $this->handler->set($this->options['prefix'] . $name, $value);
         if (!$res) {
             return false;
         } else {