On 22 May 2016 07:01, "John R Pierce" <pierce at hogranch.com> wrote: > > On 5/21/2016 6:03 PM, John R Pierce wrote: >> >> i started to look at SCL and got lost pretty quickly. I'm not running OwnCloud but I've got some other php stuff thats getting increasingly unhappy about the stock c6 php... > > > ok, I've installed php54-1.1-5.el6.centos.alt.x86_64 ... if I run `scl enable php54`, will that connect it up to my existing apache, so it just works, or will that blow the heck out of everything on my host, or something else? I'm currently using php-5.3.3-46.el6_7.1.x86_64 > The scl enable stuff just affects the command passed. It has no system wide level effect. This is why to get a terminal session with it in affect you use scl enable php54 bash ... then that session will show php 5.4 when running the php binary. The documentation on how to actually use it for something like php in Apache is terrible, and the general blogs on it are awful overall. Things like doing source /opt/rh/foo/enable seem to be frequently mentioned despite not being what the RH docs say. There's also a lot of confusion between the CentOS SIG SCL stuff, the official RHEL SCL stuff and the generic softwarecollections.org stuff. As for mod_php from an SCL from my discussions with Remi on the topic he prefers to use php-fpm in that situation rather than mod_php since that then allows use of different php versions via passing that particular application to a different pool and also allows you to move away from the worker mpm and on top a more performant one since the thread safety issues are then bypassed. Do keep in mind that the repos only have the base php packages IIRC and that still leaves the question of packages for all the other php libraries. For something like upstream php that bundles everything is not a big deal, but for other things it can be. Personally I still prefer to use IUS in this use case due to the simpler set up and larger repository of php libraries built against it. Perhaps I'll dive into a blog post soon™ negotiating through this stuff with decent examples of how to make use of the various methods, along with their pros and cons. The question comes up frequently enough on #centos that it'd be good to have a decent write up to refer to... and with a long time till C6 EOL and RH relying heavily on SCL for PHP5.4+ (rather than rebasing the php in the base distro) on it I'm sure it'll become an even more common question than it already is. Still none of the options (RH SCL, SIG SCL, SCL.org, IUS, RemiRepo) help us EPEL since we can only depend on what's in base or EPEL for package dependencies, and all efforts to get SCL approved in the Fedora Packaging Guidelines have been rejected over the past few years.