Change delimiter used in regexes to solve output error problem

While working with Zend Server 8.0.0-beta I got the following error on a multisite implementation.

![screen shot 2014-11-21 at 17 21 37](https://cloud.githubusercontent.com/assets/343359/5145456/3ba068de-71a3-11e4-9a86-c0528528e933.png)

This PR uses a bit more safe character as regex delimiter.