Various statistical functions for PHP.
- pnorm implementation based on Shin-ichiro HARA's work @ http://blade.nagaokaut.ac.jp/~sinara/ruby/math/statistics2/statistics2-0.53/ext/statistics2.c
- Wilson lower bound CI based on Evan Miller's post @ http://www.evanmiller.org/how-not-to-sort-by-average-rating.html
$ phpize $ ./configure $ make $ sudo make install