what is a plugin? – plugin handbook

Plugins are packages of code that extend the functionality of WordPress.   WordPress plugins are made up of PHP code and can include other assets such as images, CSS, and JavaScript..   By making your own plugin you extending WordPress, i.e building functionality on top of what WordPress already offers. For example, plugin that displays links to the ten most recent posts on your site..   Or, using WordPress custom post types, plugin that creates full-featured support ticketing system with email notifications, custom ticket statuses, and client-facing portal.   Most WordPress plugins are composed of many files, and plugin really needs one main file with specifically formatted DocBlock in the header..   Hello Dolly, one of the first plugins, is only 100 lines long.   Hello shows lyrics from the in WordPress admin.   Some CSS is used in PHP file to control how the lyric is styled..   you have opportunity to create plugin that will be installed, tinkered with, and loved by millions of WordPress users.   The Plugin Handbook is here to help you with that...   Read more