homebrew - brew fails to install php redis extension?

Error: Invalid formula: /usr/local/Library/Taps/homebrew/homebrew-php/Formula/arcanist.rb
Formulae found in multiple taps:

• homebrew/php/php53

• josegonzalez/php/php53

Please use the fully-qualified name e.g. homebrew/php/php53 to refer the formula.

回复内容：

Error: Invalid formula: /usr/local/Library/Taps/homebrew/homebrew-php/Formula/arcanist.rb
Formulae found in multiple taps:

• homebrew/php/php53

• josegonzalez/php/php53

Please use the fully-qualified name e.g. homebrew/php/php53 to refer the formula.