I have just enabled Pear on one of my domains.
I have SS site running in this domain (httpdocs root). It has been up for a few months now no problems.
I have developed a small FaceBook app that I have running in a directory eg /httpdocs/app
I just added a feature to the FB app that required Pear, so I enabled it for http and https (see: http://kb.mediatemple.net/questions/514/Enabling+PEAR+by+setting+your+open_basedir+and+include_path)
My primary SS site is now down.
Currently loading a 404 url will get me the 404 page.
Any 'good' url will result in a blank page.
If I load www.mysite/admin I see the url redirection to mysite.com/Security/login?BackURL=%2Fadmin
meanwhile the FB app is running fine.
My server has a setup that has a httpdocs and a httpsdocs directory, I am using just the httpdocs (this has been fine in the past)
Since I setup the vhost_ssl.conf file could I have a path issue?
Or is there another reason that enabling PEAR might have crippled my SilverStripe install?
I don't know what to look at next?
PS. my SS install is 2.4.4
EDIT: additionally an internal data link, that SS is outputting to a flash file as xml also errors out. It is interesting because it appears that the browser is getting the Header (xml) but not the data.