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data validation plugin developer handbook wordpress developer resources 444 captures 24 mar 2015 16 sep 2026 nov dec jan 09 2021 2022 2023 success fail about this capture timestamps the wayback machine http web archive org web 20221209150823 https developer wordpress org plugins security data validation skip to content log in register wordpress org news download extend get wordpress themes patterns plugins openverse mobile hosting learn learn wordpress support forums wordpress tv developers community make wordpress wordcamp meetups photo directory job board five for the future about about wordpress showcase gutenberg enterprise get wordpress search get wordpress menu developer resources chapters introduction to plugin development what is a plugin plugin basics header requirements including a software license activation deactivation hooks uninstall methods best practices determining plugin and content directories plugin security checking user capabilities data validation securing sanitizing input securing escaping output nonces hooks actions filters custom hooks advanced topics privacy policy content personal data export personal data erasure advanced topics administration menus top level menus sub menus shortcodes basic shortcodes enclosing shortcodes shortcodes with parameters tinymce enhanced shortcodes settings settings api using settings api options api custom settings page metadata managing post metadata custom meta boxes rendering post metadata custom post types registering custom post types working with custom post types taxonomies working with custom taxonomies term splitting wp 4 2 users working with users working with user metadata roles and capabilities http api javascript ajax jquery jquery ajax server side php and enqueuing heartbeat api summary cron understanding wp cron scheduling scheduling wp cron events hooking wp cron into the system task scheduler testing of wp cron internationalization localization how to internationalize your plugin internationalization security the plugin directory detailed plugin guidelines planning plugins using subversion alerts and warnings developer faq developer tools debug bar and add ons helper plugins credits browse home plugin handbook plugin security data validation data validation this content has been moved to the data validation page in the common apis handbook handbook navigation checking user capabilities securing sanitizing input about news hosting donate support developers get involved learn showcase plugins themes patterns wordcamp wordpress tv buddypress bbpress wordpress com matt privacy public code wordpress org wordpress org visit our facebook page visit our twitter account visit our instagram account visit our linkedin account