问题一：
执行执行 phpize 报错：
grep: /usr/include/php/main/php.h: No such file or directory
grep: /usr/include/php/Zend/zend_modules.h: No such file or directory
grep: /usr/include/php/Zend/zend_extensions.h: No such file or directory
Configuring for:
PHP Api Version:
Zend Module Api No:
Zend Extension Api No:
解决办法：
sudo ln -s/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include /usr/include
PS：经测试，适用于 Yosemite (10.10) Xcode 6.0.1 (6A317)
问题二：
如果执行 phpize 提示如下错误：
Cannot find autoconf. Please check your autoconf installation
and the $PHP_AUTOCONF environment variable.
解决办法：
先安装Homebrew：
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" ＃最新修改
然后安装 autoconf ：
brew install autoconf
转载地址：http://my.oschina.net/Twitter/blog/287543