PHP 7.0 (and 5.6) on Ubuntu

PHP 7 is released but for those of us who don't usually compile our own PHP, it can be a long wait for our preferred distro to release the packages we want. For Ubuntu, I'm using a PPA which allows both PHP 5.6 and PHP 7.0 to be installed, including things like extensions, at the same time. It was very easy to set up (I'm running Ubuntu 15.10 but this process should also work on older versions back to at least 14.04 which is the previous LTS) so here's a quick walkthrough of what I did.

Add the PPA

The PHP 5.6 and PHP 7.0 packages are from a third party PPA, not provided by the official ubuntu repositories from Canonical. The PPAs I'm recommending here are from Ondřej Surý who packages PHP for Debian (which is then used by Ubuntu) so while it's not an official repo, he's not exactly random! The PPA itself is here:

Complete aside but an important one: The work of the packagers is voluntary and they enable the rest of us to do whatever it is that we do. If you want us to keep being able to have nice things, consider the donation page for this project, please?

To add the PPA to your setup:

sudo add-apt-repository ppa:ondrej/php

Then we'll also want to grab information about what is on offer from this new PPA, so then run:

sudo apt-get update

Install New PHP Versions

I already had some of the php5 packages installed, but I didn't uninstall anything, I just let apt work out what it wanted to do when I asked it to install the new versions:

sudo apt-get install php5.6 php7.0

This resulted in a lot of complaining from apt and lots of conflicts. The first suggested resolution was to remove all the stock php5 packages so that PHP 5.6 could be installed - so I just accepted the first suggestion.

I use apache so this setup gave me apache with both php5.6 and php7.0 modules available, and the php5.6 module actually loaded.

As well as just the PHP itself, all the extensions and other tools you'd expect with PHP are there for both versions of PHP so it's very easy to add in the modules that you need. I was very, very impressed with how nicely this is done.

Configuring and Switching Versions

Now you have two completely separate versions of PHP installed on your system, so let's have a look at where all the pieces went!

The config files are all in /etc/php/5.6 and /etc/php/7.0 respectively - inside here is where you can configure which extensions are loaded, set the ini settings, and everything else for each version in isolation.

I'm an apache user, and as I mentioned both modules are available. So to switch from one to the other I need to do:

sudo a2dismod php5.6
sudo a2enmod php7.0
sudo service apache2 restart

For nginx users, the changes are almost as easy, Digital Ocean have good documentation on this (they do have great docs!) so check out their guide: as it includes a section on reconfiguring nginx to use another version of PHP.

From the commandline, I have both php5.6 and php7.0 available as commands. I also still have a php command - look in /etc/alternatives to see that it symlinks to a particular version of PHP cli*. You can also quickly check which yours is using by running php -v.

* more specifically, run which php to see which version of PHP is being used - but this will probably point to /usr/bin/php, which for me is itself a symlink to the /etc/alternatives/php command.

Working with Extensions

This PPA comes with the usual php-pear package which offers the pecl command for both versions of PHP, so any extensions that are available via PECL can be installed in the usual way. You will also need the relevant headers so either php5.6-dev or php7.0-dev should be installed.

When the pecl installation completes, you'll get a note to add the *.so file to your php.ini; in fact the best thing to do here is to look at what's in /etc/php/mods-available. There will be some modules already here, each in its own file named after the extension and ending in .ini. You can copy one to use as a template or create your own and put all the relevant configuration for the extension in it (as a minimum, you need extension=[extensionName].so).

Once the new extension is in mods available, enable and then check it by doing:

sudo phpenmod extension
php -m

This will create the symlinks in the right places for your current version of PHP to load this module, and you should see it in the list of modules output by the php -m. Pro tip: if you don't see it in the output, scroll all the way to the top of the output and see if there are any useful error messages there.

There are some extensions that aren't currently available either by default or via pecl so I'll write a followup post on compiling an extension from source to use with your PHP.

17 thoughts on “PHP 7.0 (and 5.6) on Ubuntu

  1. One of the issues I had when I was adding this PPA a couple of months ago was that it kept failing. I managed to find out that you needed to specify UTF-8 as the language when adding the PPA:

    LC_ALL=en_US.UTF-8 add-apt-repository ppa:ondrej/php-7.0

  2. Pingback: PHP7 on Ubuntu 15.10 - Chema Garrido

  3. I've used the ondrej/php to upgrade a VVV box (the standard WordPress dev environment) - it works very well.

    If anyone's using Debian (assuming you're on Jessie – the stable release) you want DotDeb –
    On Debian, PHP 5.6 (from Jessie) and 7 (from DotDeb) co-exist nicely without any warnings, you just install the php70 packages on top.

    I didn't even bother to check if that was possible and went for an all or nothing approach; test all my sites in PHP7 on dev first, push the code on production, make all the nginx configs consistent (including moving the PHP section into a single shared file), then finally update that to point to the new php-fpm socket after php7 was installed.

    What I could (and probably should) have done, is install php7 first, leave 5.6 running, then switch one site over at a time - easy with Nginx because it doesn't know anything about PHP, it just sends the requests wherever you tell it.

    I've not noticed a reduction in CPU load, but mine was very low to begin with. I'm yet to upgrade a production which is running WordPress, but it's super fast on the dev VM.

    Incidentally, surprisingly few people have watched this talk by Rasmus - loads of useful tips in it.

  4. If you're prepared to wait a couple of months, Ubuntu 16.04 (due out in April and a Long Term Support release) will have 5.6 and 7.0 and you won't need to rely on a PPA.

    If you are planning to upgrade but use the PPA in the meantime, make sure you keep a careful watch on the version numbers as I don't think it's particularly easy to switch from a PPA to the main repository for a package if the PPA version is higher.

    • It is definitely going to have at least one of 5.6 or 7.0 but there are still conflicting posts all over the place that suggest which one. But I have read that they will not have both. I hope they do though.

      • Ubuntu is going to drop either 5.6 or 7 before feature freeze (or actually after, as PHP got some kind of exception), but ATM it is looking as if they will drop 5.6 and go the php7 route. The thing with both versions was mentioned many times as transitional testing if php7 meets the required stability until free deadline, so ATM there is NO co-installability for xenial mentioned anywhere official!

      • I'd be *very* surprised if they don't include both (and both are currently showing in the archive, so there's only about a month to pull one or the other before release). An LTS release which doesn't have 5.x would be useless for a lot of people who haven't migrated their code to 7.

        • Not to be a spoilsport but check the corresponding bug and comment section. It is _very_ clear, that Xenial will drop one or the other for going live. Ubuntu won't likely have both versions in main and wanting to support it. I even suggested it, but it doesn't seem to give much.

          So no, I'd be *very* surprised myself if they would include both. It would be very appreciated for sure (as I write from a hoster/hosting perspective) but likely won't happen. That's why I suggest keeping an eye out for Ondrej Sury and his co-installability repos with 5.6 and 7 and hope he will support xenial with his repo as well and not drop support for 5.6, too.

  5. Pingback: PHP Annotated Monthly – February 2016 | PhpStorm Blog

  6. To switch the php command you shouldn't change the symlinks in /etc/alternatives manually. Use thze command line tool for this.

    sudo update-alternatives --config php

    This shows all available options and you can select the one you want.

  7. Pingback: Which version of PHP will be in Ubuntu 16.04? | PHP Developer

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  9. Pingback: Installing PHP 7 on Ubuntu 16.04 | Shaun Freeman

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