PHP's filter extension

When I read about PHP's filter functions, http://php.net/filter, I had to try them out.

the install promises to be short and sweet: $ pecl install filter

in reality, it was anything but sweet, after a little searching around, here are the commands that I used with help from pecl bug 9680, for installation on feisty ubuntu:

> sudo apt-get install php5-dev
> sudo apt-get install libpcre3-dev
> sudo pecl install channel://pecl.php.net/filter-0.9.2