braintree/braintree_php — pull request #27 by jonthornton (2013-08-03 15:18:59+00:00)
Title: Converted preg_replace() /e modifiers to preg_replace_callback()

http://php.net/manual/en/migration55.deprecated.php
preg_replace() \e is depricated in PHP5.5 and throws a warning