WP-CLI: WordCamp NYC 2015

@wpengine #WCNYC Terell Moore, Operations Engineer
./WP-CLI
Work faster, not harder.

@wpengine #WCNYC Terell Moore, Operations Engineer@wpengine #WCNYC Terell Moore, Operations Engineer
My name is Terell…
Operations Engineer at WP Engine
Support Tech for 2 years, Operations for 1
Uses WP-CLI to manage over 300,000 WordPress sites
WP-CLI saves me valuable time, and allows me to be more efficient
at my job.
A bit about myself

A command line interface to manage WordPress sites
Able to be scripted to automate tedious tasks
Extensible, allowing you to build your own commands
What is WP-CLI?

Installing WP-CLI
1.Download the wp-cli.phar file
https://raw.githubusercontent.com/wp-
cli/builds/gh-pages/phar/wp-cli.phar
2. Test it out
$ php wp-cli.phar --info
3. Move it to /usr/local/bin/wp & make it executable (Optional)
$ chmod +x wp-cli.phar
$ mv wp-cli.phar /usr/local/bin/wp

http://wp-cli.org/commands/
32 built-in commands to assist with managing core WordPress
functionality
Everything from installing a plugin to setting wp_cache values
Built-in WP-CLI commands

Automating WP Core
Installation

$ wp core download
Downloading WordPress 4.3.1 (en_US)...
Success: WordPress downloaded.
$ wp core config --dbname=wcnyc1 --dbuser=root
Success: Generated wp-config.php file.
$ wp db create
Success: Database created.
$ wp core install --prompt
...
Success: WordPress installed successfully.
Automating WP Core Installation

$ wp theme install sydney
Installing Sydney (1.18)
Downloading install package from
https://downloads.wordpress.org/theme/sydney.1.18.zip...
Unpacking the package...
Installing the theme...
Theme installed successfully.
Success: Translations updates are not needed for the 'English (US)' locale.
$ wp theme activate sydney
Success: Switched to 'Sydney' theme.
Automating WP Core Installation

Verify that your WordPress core files haven’t been tampered with,
using verify-checksums.
$ wp core verify-checksums
Warning: File doesn't verify against checksum: wp-settings.php
Error: WordPress install doesn't verify against checksums.
Regular WordPress Maintenance

Regular WordPress Maintenance
Update all the things. All the time.
$ wp core update
$ wp plugin update --all
$ wp theme update --all

Migrate between staging and live
$ wp export
...
Success: All done with export.
$ wp plugin activate wordpress-importer
Success: Plugin 'wordpress-importer'
activated.
$ wp import /path/to.xml --authors=create

Community Commands
Built into many popular plugins (Jetpack, W3 Total Cache, etc)
Write your own
Using the commands cookbook, you can write your own
commands
Extending WP-CLI

https://github.com/wp-cli/wp-cli/wiki/Commands-Cookbook
Each command has it’s own class
Public functions within the class are subcommands
Building your own WP-CLI commands

But how does it scale?
How WP Engine uses WP-CLI to support 300,000 WordPress
sites

WP-CLI helped WP Engine upgrade 17,000 insecure versions of
Jetpack
Upgrading Jetpack
across 17,000 sites

1.A list of all sites with Jetpack installed - easy with WP-CLI!
for i in `ls /nas/wp/www/sites/`;
do echo $i && wp plugin get jetpack --
format=json --fields=name,status,version --
path=/nas/wp/www/sites/$i;
done
Updating Jetpack across 17,000 sites

2. Run the update - still easy with WP-CLI!
for i in hhvm wcnyc1 wcnyc2 wcnyc3 wcnyc4;
do wp plugin update jetpack --
path=/nas/wp/www/sites/$i;
done

What we’ve learned
We can leverage WP-CLI in our existing automation platform
(Ansible) to reach thousands of our servers
Better than dropping-in files using other methods
We can do this with themes, and WordPress core as well

Live demo

Q&A

WP-CLI: WordCamp NYC 2015

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