SPL Types is a collection of special typehandling classes. Formula was removed
Last version was
php54-spl-types requires the following formula to be installed:
autoconf 2.69 Automatic configure script builder

Recent formula history

Mike McQuaid Deprecate tap.
Andreas Braun Add description for spl-types formula
Andy Blyler php54-spl-types: convert from sha1 to sha256
Andy Blyler fix style issues
Andy Blyler Update URLs to use HTTPS

Formula code at GitHub