Brew installation of xhprof failed, how to solve it-php tutorial

As follows:

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
 

Response content:

As follows:

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
 

There should be a problem with the PHP version. For the source code of homebrew-php, try installing version 5.3+.

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