brew 安装xhprof失败，请问怎么解决

如下：

brew install php56-xhprof
==> Installing php56-xhprof from homebrew/homebrew-php
==> Downloading https://github.com/facebook/xhprof/archive/254eb24dcfa763c76c57b472093ebc4b81af2b7d.tar.gz
######################################################################## 100.0%
==> Patching
Error: Unable to guess PHP branch for Formulary::Formulae::Php56Xhprof

---

应该是PHP版本有问题，homebrew-php的源码,你尝试安装一下5.3+的版本。

def php_branch
    class_name = self.class.name.split("::").last
    matches = /^Php5([3-9]+)/.match(class_name)
    if matches
      "5." + matches[1]
    else
      raise "Unable to guess PHP branch for #{class_name}"
    end
  end