Plugin development in WordPress means creating a custom plugin to add or change site features without editing core files. A plugin is a set of PHP files, and sometimes CSS, JavaScript, and templates, that runs inside WordPress. Developers use hooks like actions and filters to connect code to WordPress events, such as saving a post or loading a page. Plugins can create admin pages, add shortcodes, register custom post types, connect APIs, and build custom blocks. Good plugins follow WordPress coding standards, use secure input validation, and support updates. Plugin development helps you build reusable, portable functionality for one site or many sites.
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