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WordPress Mumbai
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Introduction
To Plugin
Development
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EXPECTATIONS
&
TAKEAWAYS
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PLUGINS
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Why Plugins ?
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Types Of Plugins ?
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Types Of Plugins ?
Functionality
Enhancement
Site Specific Plugin
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Plugin vs Theme Territory !
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LICENSING
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Why its important?
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Why its important ?
Permissions
Conditions
Limitations
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Resources
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Resources
https://choosealicense.com/licenses/
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Resources
https://opensource.org/licenses
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Resources
https://en.wikipedia.org/wiki/Comparison_of_free_and_open-source_software_licenses
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DEVELOPMENT
ENVIRONMENT
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Development Stack
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WAMP
XAMPP
MAMP
Varying Vagrant Vagrants
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Code Editor
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SublimeText
Atom
Brackets
NotePad++
TextWrangler
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Source Control
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Local Git
GitHub
GitLab
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RESOURCES
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Developer Handbook
https://developer.wordpress.org/plugins/
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WordPress TV
http://wordpress.tv/?s=plugin
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Developer Reference
https://developer.wordpress.org/reference/
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Generate WP
http://generatewp.com
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Patterns
https://github.com/0aveRyan/patterns
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Custom Meta Boxes
https://github.com/humanmade/Custom-Meta-Boxes
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GETTING
STARTED
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Procedural? Oops? Boilerplate?
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Plan & Move Accordingly
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BASIC PLUGIN
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Basic Structure
my-plugin
my-plugin.php
readme.txt
license.txt
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Plugin Header
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Plugin Header
my-plugin.php
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Hooks
Activation
Deactivation
Uninstall
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Hooks
Activation/Deactivation/Uninstall
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BEST PRACTICES
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File Organization
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Follow WordPress Design
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Coding Standards
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Avoid Naming Collisions
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o Prefix everything
o Check for Existing Implementations
o Variables: isset() (includes arrays, objects, etc.)
o Functions: function_exists()
o Classes: class_exists()
o Constants: defined()
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Conditional Loading
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Plugin Architecture
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Boilerplate Starting Points
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Components
Of Plugin
Development
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SECURITY
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Checking User Capabilities
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Data Validation
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Securing Input & Output
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Nonces
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HOOKS
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What are hooks ?
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Types Of Hooks
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Action
Filter
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Custom Hooks
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Why Custom Hooks?
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ADMIN MENU
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Top Level Menu
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Sub Menu
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SHORTCODES
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Why Shortcodes?
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Default Shortcodes
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[caption] – shortcode that allows you to wrap captions around content
[gallery] – shortcode that allows you to show image galleries
[audio] – shortcode that allows you to embed and play audio files
[video] – shortcode that allows you to embed and play video files
[playlist] – shortcode that allows you to display collection of audio or video files
[embed] – shortcode that allows you to wrap embedded items
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Basic Shortcodes
[wporg] is your new shortcode. The use of the shortcode will trigger the wporg_shortcode callback function.
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Enclosing Shortcodes
[wporg]content to manipulate[/wporg]
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Shortcodes With Parameters
[wporg title="WordPress.org"]content to manipulate[/wporg]
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SETTINGS
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Settings
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Settings API
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Options API
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Why we need settings API?
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METADATA
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What is Metadata?
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Managing MetaData
add_post_meta()
update_post_meta()
delete_post_meta()
get_post_meta()
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Meta Boxes
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Custom Meta Boxes
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CUSTOM
POSTTYPES
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What is posttype?
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Default PostTypes
Post
Page
Attachment
Revision
Menu
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What is custom posttypes?
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Custom PostType
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TAXANOMIES
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What is Taxonomy?
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Default Taxonomies
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Custom Taxonomies
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WORDPRESS.ORG
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Hosting not source control
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Important things to consider
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readme.txt
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Readme.txt > WordPress.org
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Plugin Submission
https://wordpress.org/plugins/developers/add/
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What next ?
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Advanced Topics
ACL (Access Control List)
HTTP API
WP Cron
Internationalisation & Localisation
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Thank You