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WordPress Plugin Development
<p>Create custom WordPress plugin adding unique functionality to WordPress sites with professional development practices. This plugin development includes: feature specification defining exactly what plugin will do and how users will interact with it, WordPress compatibility ensuring plugin works with current WordPress version and common themes, and coding standards following WordPress PHP coding standards and best practices. Plugin architecture includes: object-oriented PHP writing clean, modular code using classes and namespaces, hook system properly using WordPress actions and filters without modifying core, database schema if storing data, creating custom tables or using options API, and security implementing nonce verification, data sanitization, and capability checks. Admin interface includes: settings page creating options page in WordPress admin for plugin configuration, meta boxes adding custom fields to post/page editor, custom post types registering new content types with appropriate capabilities, custom taxonomies adding categorization systems for custom content, and admin notices displaying success, error, or warning messages to admins. Frontend functionality includes: shortcodes creating shortcodes users can embed in content, widgets developing sidebar widgets with customizable options, Gutenberg blocks if appropriate, creating modern block editor components, and template override allowing theme developers to customize plugin output. AJAX functionality includes: frontend AJAX handling form submissions or dynamic content loading without page refresh, admin AJAX processing admin actions asynchronously improving user experience, nonce security validating AJAX requests preventing CSRF attacks, and error handling gracefully handling failures returning helpful messages. Internationalization includes: text domain wrapping all strings in translation functions for multilingual support, POT file generating translation template for translators, and RTL support ensuring plugin works with right-to-left languages. Performance includes: query optimization writing efficient database queries avoiding N+1 queries, lazy loading loading features only when needed reducing overhead, caching implementing transients or object caching for expensive operations, and script/style management enqueueing assets only on pages where needed. Plugin settings includes: options API storing plugin settings in wp_options table, settings API using WordPress Settings API for standardized settings pages, option sanitization validating and cleaning saved settings, and default options providing sensible defaults on first activation. Hooks and filters includes: action hooks providing hooks for developers to extend plugin functionality, filters allowing modification of plugin output or behavior, and documentation documenting all hooks with parameters and usage examples. Multisite support includes: network activation if relevant, allowing plugin activation network-wide, per-site settings differentiating settings between sites in network, and network admin pages providing network-level configuration if needed. Plugin updates includes: update checker implementing automatic update notification from your server or WordPress.org, version migration handling database or settings changes when plugin updates, and backward compatibility maintaining compatibility with older WordPress versions if possible. Testing includes: unit testing writing PHPUnit tests for core functions, integration testing testing plugin with various themes and plugins, WordPress versions testing on supported WordPress versions ensuring compatibility, and user testing having real users test before public release. WordPress.org submission includes: readme.txt writing comprehensive readme following WordPress.org format, screenshots providing screenshots showing plugin in action, tags and categories selecting appropriate tags for discoverability, and GPL licensing ensuring code is GPL-compatible for WordPress.org approval. Security includes: SQL injection prevention using $wpdb prepare for all database queries, XSS protection escaping output with esc_html, esc_url, esc_attr, CSRF protection using nonces for all form submissions and AJAX requests, and capability checks verifying user permissions before executing admin functions. Documentation includes: user documentation explaining how to install, configure, and use plugin, code documentation inline PHPDoc comments explaining functions and parameters, hook reference documenting all actions and filters for developers, and FAQ addressing common questions or issues. Support includes: bug fixes addressing bugs discovered after release, feature additions adding new features based on user feedback, WordPress updates ensuring compatibility when WordPress releases major updates, and forum support if on WordPress.org, monitoring and responding to support threads. Delivered components includes: plugin files complete plugin directory with all PHP, CSS, JavaScript, and assets, readme.txt WordPress.org readme for plugin listing, documentation user and developer documentation, and license file GPL-compatible license. Perfect for agencies adding custom functionality for client sites, plugin developers building products for WordPress.org or premium market, businesses with specific WordPress needs not met by existing plugins, and developers creating internal tools for WordPress projects.</p>
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