From 860410be29627212b5dbd485664ace2d4e6188b3 Mon Sep 17 00:00:00 2001
From: Ching-Ping Sun <252880+tomjpsun@users.noreply.github.com>
Date: Fri, 18 Jan 2019 17:29:42 +0800
Subject: [PATCH] fix example typo

---
 7/extension_intro.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/7/extension_intro.md b/7/extension_intro.md
index f6aafc8..020a179 100644
--- a/7/extension_intro.md
+++ b/7/extension_intro.md
@@ -270,7 +270,7 @@ __(5)PHP_ADD_INCLUDE(path):__ 添加include路径，即：`gcc -Iinclude_dir`，
 
 __(6)PHP_CHECK_LIBRARY(library, function [, action-found [, action-not-found [, extra-libs]]]):__ 检查依赖的库中是否存在需要的function，action-found为存在时执行的动作，action-not-found为不存在时执行的动作，比如扩展里使用到线程pthread，检查pthread_create()，如果没找到则终止./configure执行：
 ```sh
-PHP_ADD_INCLUDE(pthread, pthread_create, [], [
+PHP_CHECK_LIBRARY(pthread, pthread_create, [], [
     AC_MSG_ERROR([not find pthread_create() in lib pthread])
 ])
 ```