PHPのYAMLライブラリをhome brewでインストール

php -version
PHP 5.5.31 (cli) (built: Feb 20 2016 20:33:10)
Copyright (c) 1997-2015 The PHP Group
Zend Engine v2.5.0, Copyright (c) 1998-2015 Zend Technologies

brew search yaml
libyaml                                                                          yaml-cpp
homebrew/emacs/yaml-mode   homebrew/php/php53-yaml    homebrew/php/php54-yaml    homebrew/php/php55-yaml    homebrew/php/php56-yaml    homebrew/php/php70-yaml

brew install php55-yaml
Error: No available formula with the name "php55-yaml"
==> Searching for similarly named formulae...
Error: No similarly named formulae found.
==> Searching taps...
This formula was found in a tap:
homebrew/php/php55-yaml
To install it, run:
  brew install homebrew/php/php55-yaml

brew install homebrew/php/php55-yaml

；途中長いので省略

To finish installing yaml for PHP 5.5:
  * /usr/local/etc/php/5.5/conf.d/ext-yaml.ini was created,
    do not forget to remove it upon extension removal.
  * Validate installation via one of the following methods:
  *
  * Using PHP from a webserver:
  * - Restart your webserver.
  * - Write a PHP page that calls "phpinfo();"
  * - Load it in a browser and look for the info on the yaml module.
  * - If you see it, you have been successful!
  *
  * Using PHP from the command line:
  * - Run `php -i "(command-line 'phpinfo()')"`
  * - Look for the info on the yaml module.
  * - If you see it, you have been successful!
==> Summary
  /usr/local/Cellar/php55-yaml/1.2.0: 2 files, 45.4K, built in 19 seconds

ls -alF /usr/local/etc/php/5.5/conf.d/ext-yaml.ini
-rw-r--r--  1 hogetaro  admin  53  5 22 11:25 /usr/local/etc/php/5.5/conf.d/ext-yaml.ini

php -r 'phpinfo();'

:ずらずらっといろいろと表示された中にyamlの情報を発見
yaml

LibYAML Support => enabled
Module Version => 1.2.0
LibYAML Version => 0.1.6

Directive => Local Value => Master Value
yaml.decode_binary => 0 => 0
yaml.decode_php => 1 => 1
yaml.decode_timestamp => 0 => 0
yaml.output_canonical => 0 => 0
yaml.output_indent => 2 => 2
yaml.output_width => 80 => 80

php test02.php
yaml_parse(): 0.090523958206177