1. LazyPress
Developing for WordPress on
the Command Line

2. Why CLI?
• All Keyboard Commands
• Efficient
• Fast
• Does Not Require the Web Server
resources

3. Installing WP-CLI
> curl http://wp-cli.org/installer.sh | bash
> PATH=$HOME/.composer/bin:$PATH
> source $HOME/.composer/vendor/wp-
cli/wp-cli/utils/wp-completion.bash

4. Using the wp
command
• wp core (config|download|install|update)
• wp comment (approve|count|spam|trash)
• wp export
• wp option (add|update|delete|get)
• wp plugin (install|activate|list|update)
• Etc

5. Extending WP-CLI
• if( defined( ‘WP_CLI’ ) && WP_CLI )
• ExtendWP_CLI_Command
• Public methods become commands
• Methods take $args and $assoc_args

6. Extending WP-CLI
• $args is an array of positional elements
• e.g. wp command Hello World
• $args[0] == ‘Hello’
• $args[1] == ‘World’

7. Extending WP-CLI
• $assoc_args is an array of flags
• e.g. wp command --foo=Hello
--bar=World
• $assoc_args[‘foo’] == ‘Hello’
• $assoc_args[‘bar’] == ‘World’

8. Declaring Syntax
• Methods should have a Docblock using
@synopsis
• Square brackets designate optional
• @synopsis cmd <foo> --bar=<bar> [--
baz=<baz>]

9. Printing to the CLI
• Use the line() method from the WP_CLI
class
• WP_CLI::line(‘Hello World is a Success!’);

10. Defining the
Command
• Use the add_command() method from
the WP_CLI class
• Argument 1 is the command name
• Argument 2 is the Class name
• WP_CLI::add_command( ‘hello’,‘world’);
• Running wp hello instantiates the world
class

11. Resources
• WP-CLI - http://wp-cli.org
• WP-CLI on Github -
http://github.com/wp-cli
• Sample Code -
https://github.com/technosailor/baltimoreph
p-wpcli
• BreweryDB - http://brewerydb.com

12. Credits
• “Boh” photo by Sidewalk Flying on Flickr
• “Crab” and “Aquarium” photos by
WallyG on Flickr
• “Oriole Bird” photo by Keith Allison on
Flickr
• All photos used under the Creative
Commons License