To develop a WordPress plugin, you need a WordPress installation to test, a code editor, and a local or staging server running PHP and MySQL/MariaDB. Learn basic PHP, plus how WordPress loads plugins, uses hooks (actions and filters), and handles options and database access with $wpdb. Understand HTML, CSS, and JavaScript for admin screens or front-end features. Use secure practices like nonces, capability checks, sanitization, and escaping. Follow WordPress coding standards and proper file structure with a plugin header. Version control (Git) and debugging tools (WP_DEBUG) help you build, test, and maintain updates. Documentation and an upgrade path reduce issues.
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