笔记本升级到了os x 10.8了，但是偶尔还需要写点php调剂一下。看看自带的php版本?
php 5.3.13 with suhosin-patch (cli) (built: jun 20 2012 17:05:20)
copyright (c) 1997-2012 the php group
zend engine v2.3.0, copyright (c) 1998-2012 zend technologies
对于追新族来说，必须得升级到php 5.4才开心。借助homebrew很快完成升级:
安装过程
两行即可。
brew tap josegonzalez/homebrew-php
brew install php54
这样安装的php路径在/usr/local/bin/php，版本信息：
/usr/local/bin/php -v
php 5.4.4 (cli) (built: jul 27 2012 08:42:32)
copyright (c) 1997-2012 the php group
zend engine v2.4.0, copyright (c) 1998-2012 zend technologies