PHP 5.5 hashing API suggestion/question

Hi, I was wondering if you have considered using the php 5.5 hashing API for PHPRunner. It seems more secure than the current md5 hashing of passwords. Here are some articles about it.
http://www.sitepoint.com/hashing-passwords-php-5-5-password-hashing-api/
https://gist.github.com/nikic/3707231
Has this been considered? It looks fairly simple to implement, although I may be missing something. Thanks,

Brett