homebrew 升级php失败，求解决方法

升级过程如下：

brew update
error: Your local changes to the following files would be overwritten by merge:
    Formula/php56.rb
Please, commit your changes or stash them before you can merge.
Aborting
Error: Failed to update tap: homebrew/php

求解决方法

回复内容：

升级过程如下：

brew update
error: Your local changes to the following files would be overwritten by merge:
    Formula/php56.rb
Please, commit your changes or stash them before you can merge.
Aborting
Error: Failed to update tap: homebrew/php

求解决方法

找到解决办法了，如下

cd $(brew --prefix)/Library/Taps/homebrew/homebrew-php
git checkout -- Formula/php56.rb

另外很感谢@mcfog 提供的PHPBrew，很值得推荐，我会尝试的

提示很明确啊，php56.rb本地被改过，需要还原才能更新

如果你不清楚怎么被改过的话，直接

bashcd /usr/local/Library/Formula/
git reset --hard

还原全部formula文件就好

顺带继续推荐更好支持多php版本，编译更方便的PHPBrew