Title: wp-admin/includes/upgrade.php | Developer.WordPress.org --- # File: wp-admin/includes/upgrade.php * hook[wp_installed_email](https://developer.wordpress.org/reference/hooks/wp_installed_email/) * Filters the contents of the email sent to the site administrator when WordPress is installed. * Used by [1 function](https://developer.wordpress.org/reference/hooks/wp_installed_email/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/wp_installed_email/#uses) | Source: [wp-admin/includes/upgrade.php:638](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L638-L638) * function[wp_should_upgrade_global_tables()](https://developer.wordpress.org/reference/functions/wp_should_upgrade_global_tables/) * Determine if global tables should be upgraded. * Used by [3 functions](https://developer.wordpress.org/reference/functions/wp_should_upgrade_global_tables/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/wp_should_upgrade_global_tables/#uses) | Source: [wp-admin/includes/upgrade.php:3787](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3787-L3815) * hook[wp_should_upgrade_global_tables](https://developer.wordpress.org/reference/hooks/wp_should_upgrade_global_tables/) * Filters if upgrade routines should be run on global tables. * Used by [1 function](https://developer.wordpress.org/reference/hooks/wp_should_upgrade_global_tables/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/wp_should_upgrade_global_tables/#uses) | Source: [wp-admin/includes/upgrade.php:3814](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3814-L3814) * function[maybe_convert_table_to_utf8mb4()](https://developer.wordpress.org/reference/functions/maybe_convert_table_to_utf8mb4/) * If a table only contains utf8 or utf8mb4 columns, convert it to utf8mb4. * Used by [2 functions](https://developer.wordpress.org/reference/functions/maybe_convert_table_to_utf8mb4/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/maybe_convert_table_to_utf8mb4/#uses) | Source: [wp-admin/includes/upgrade.php:2767](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2767-L2798) * function[wp_install_maybe_enable_pretty_permalinks()](https://developer.wordpress.org/reference/functions/wp_install_maybe_enable_pretty_permalinks/) * Maybe enable pretty permalinks on installation. * Used by [1 function](https://developer.wordpress.org/reference/functions/wp_install_maybe_enable_pretty_permalinks/#used-by) | Uses [10 functions](https://developer.wordpress.org/reference/functions/wp_install_maybe_enable_pretty_permalinks/#uses) | Source: [wp-admin/includes/upgrade.php:496](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L496-L558) * function[maybe_disable_automattic_widgets()](https://developer.wordpress.org/reference/functions/maybe_disable_automattic_widgets/) * Disables the Automattic widgets plugin, which was merged into core. * Used by [0 functions](https://developer.wordpress.org/reference/functions/maybe_disable_automattic_widgets/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/maybe_disable_automattic_widgets/#uses) | Source: [wp-admin/includes/upgrade.php:3665](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3665-L3675) * function[maybe_disable_link_manager()](https://developer.wordpress.org/reference/functions/maybe_disable_link_manager/) * Disables the Link Manager on upgrade if, at the time of upgrade, no links exist in the DB. * Used by [0 functions](https://developer.wordpress.org/reference/functions/maybe_disable_link_manager/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/maybe_disable_link_manager/#uses) | Source: [wp-admin/includes/upgrade.php:3685](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3685-L3691) * hook[dbdelta_create_queries](https://developer.wordpress.org/reference/hooks/dbdelta_create_queries/) * Filters the dbDelta SQL queries for creating tables and/or databases. * Used by [1 function](https://developer.wordpress.org/reference/hooks/dbdelta_create_queries/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/dbdelta_create_queries/#uses) | Source: [wp-admin/includes/upgrade.php:2968](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2968-L2968) * function[pre_schema_upgrade()](https://developer.wordpress.org/reference/functions/pre_schema_upgrade/) * Runs before the schema is upgraded. * Used by [1 function](https://developer.wordpress.org/reference/functions/pre_schema_upgrade/#used-by) | Uses [6 functions](https://developer.wordpress.org/reference/functions/pre_schema_upgrade/#uses) | Source: [wp-admin/includes/upgrade.php:3701](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3701-L3767) * hook[dbdelta_insert_queries](https://developer.wordpress.org/reference/hooks/dbdelta_insert_queries/) * Filters the dbDelta SQL queries for inserting or updating. * Used by [1 function](https://developer.wordpress.org/reference/hooks/dbdelta_insert_queries/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/dbdelta_insert_queries/#uses) | Source: [wp-admin/includes/upgrade.php:2979](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2979-L2979) * function[make_db_current()](https://developer.wordpress.org/reference/functions/make_db_current/) * Updates the database tables to a new schema. * Used by [0 functions](https://developer.wordpress.org/reference/functions/make_db_current/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/make_db_current/#uses) | Source: [wp-admin/includes/upgrade.php:3343](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3343-L3350) * function[make_db_current_silent()](https://developer.wordpress.org/reference/functions/make_db_current_silent/) * Updates the database tables to a new schema, but without displaying results. * Used by [4 functions](https://developer.wordpress.org/reference/functions/make_db_current_silent/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/make_db_current_silent/#uses) | Source: [wp-admin/includes/upgrade.php:3364](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3364-L3366) * function[make_site_theme_from_oldschool()](https://developer.wordpress.org/reference/functions/make_site_theme_from_oldschool/) * Creates a site theme from an existing theme. * Used by [1 function](https://developer.wordpress.org/reference/functions/make_site_theme_from_oldschool/#used-by) | Uses [1 function](https://developer.wordpress.org/reference/functions/make_site_theme_from_oldschool/#uses) | Source: [wp-admin/includes/upgrade.php:3379](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3379-L3474) * function[make_site_theme_from_default()](https://developer.wordpress.org/reference/functions/make_site_theme_from_default/) * Creates a site theme from the default theme. * Used by [1 function](https://developer.wordpress.org/reference/functions/make_site_theme_from_default/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/make_site_theme_from_default/#uses) | Source: [wp-admin/includes/upgrade.php:3487](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3487-L3562) * function[make_site_theme()](https://developer.wordpress.org/reference/functions/make_site_theme/) * Creates a site theme. * Used by [0 functions](https://developer.wordpress.org/reference/functions/make_site_theme/#used-by) | Uses [4 functions](https://developer.wordpress.org/reference/functions/make_site_theme/#uses) | Source: [wp-admin/includes/upgrade.php:3573](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3573-L3613) * function[translate_level_to_role()](https://developer.wordpress.org/reference/functions/translate_level_to_role/) * Translate user level to user role name. * Used by [0 functions](https://developer.wordpress.org/reference/functions/translate_level_to_role/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/translate_level_to_role/#uses) | Source: [wp-admin/includes/upgrade.php:3623](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3623-L3643) * function[wp_check_mysql_version()](https://developer.wordpress.org/reference/functions/wp_check_mysql_version/) * Checks the version of the installed MySQL binary. * Used by [2 functions](https://developer.wordpress.org/reference/functions/wp_check_mysql_version/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/wp_check_mysql_version/#uses) | Source: [wp-admin/includes/upgrade.php:3652](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L3652-L3658) * function[dbDelta()](https://developer.wordpress.org/reference/functions/dbdelta/) * Modifies the database based on specified SQL statements. * Used by [3 functions](https://developer.wordpress.org/reference/functions/dbdelta/#used-by) | Uses [9 functions](https://developer.wordpress.org/reference/functions/dbdelta/#uses) | Source: [wp-admin/includes/upgrade.php:2907](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2907-L3329) * hook[dbdelta_queries](https://developer.wordpress.org/reference/hooks/dbdelta_queries/) * Filters the dbDelta SQL queries. * Used by [1 function](https://developer.wordpress.org/reference/hooks/dbdelta_queries/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/dbdelta_queries/#uses) | Source: [wp-admin/includes/upgrade.php:2927](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2927-L2927) * function[upgrade_network()](https://developer.wordpress.org/reference/functions/upgrade_network/) * Executes network-level upgrade routines. * Used by [1 function](https://developer.wordpress.org/reference/functions/upgrade_network/#used-by) | Uses [14 functions](https://developer.wordpress.org/reference/functions/upgrade_network/#uses) | Source: [wp-admin/includes/upgrade.php:2492](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2492-L2634) * function[maybe_create_table()](https://developer.wordpress.org/reference/functions/maybe_create_table/) * Creates a table in the database, if it doesn’t already exist. * Used by [0 functions](https://developer.wordpress.org/reference/functions/maybe_create_table/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/maybe_create_table/#uses) | Source: [wp-admin/includes/upgrade.php:2655](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2655-L2673) * function[drop_index()](https://developer.wordpress.org/reference/functions/drop_index/) * Drops a specified index from a table. * Used by [1 function](https://developer.wordpress.org/reference/functions/drop_index/#used-by) | Uses [3 functions](https://developer.wordpress.org/reference/functions/drop_index/#uses) | Source: [wp-admin/includes/upgrade.php:2686](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2686-L2701) * function[add_clean_index()](https://developer.wordpress.org/reference/functions/add_clean_index/) * Adds an index to a specified table. * Used by [0 functions](https://developer.wordpress.org/reference/functions/add_clean_index/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/add_clean_index/#uses) | Source: [wp-admin/includes/upgrade.php:2714](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2714-L2721) * function[maybe_add_column()](https://developer.wordpress.org/reference/functions/maybe_add_column/) * Adds column to a database table, if it doesn’t already exist. * Used by [0 functions](https://developer.wordpress.org/reference/functions/maybe_add_column/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/maybe_add_column/#uses) | Source: [wp-admin/includes/upgrade.php:2735](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2735-L2755) * function[get_alloptions_110()](https://developer.wordpress.org/reference/functions/get_alloptions_110/) * Retrieve all options as it was for 1.2. * Used by [0 functions](https://developer.wordpress.org/reference/functions/get_alloptions_110/#used-by) | Uses [2 functions](https://developer.wordpress.org/reference/functions/get_alloptions_110/#uses) | Source: [wp-admin/includes/upgrade.php:2809](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2809-L2822) * function[deslash()](https://developer.wordpress.org/reference/functions/deslash/) * Filters for content to remove unnecessary slashes. * Used by [0 functions](https://developer.wordpress.org/reference/functions/deslash/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/functions/deslash/#uses) | Source: [wp-admin/includes/upgrade.php:2868](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L2868-L2887) * function[wp_upgrade()](https://developer.wordpress.org/reference/functions/wp_upgrade/) * Runs WordPress Upgrade functions. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_upgrade/#used-by) | Uses [12 functions](https://developer.wordpress.org/reference/functions/wp_upgrade/#uses) | Source: [wp-admin/includes/upgrade.php:660](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L660-L700) * hook[wp_upgrade](https://developer.wordpress.org/reference/hooks/wp_upgrade/) * Fires after a site is fully upgraded. * Used by [1 function](https://developer.wordpress.org/reference/hooks/wp_upgrade/#used-by) | Uses [0 functions](https://developer.wordpress.org/reference/hooks/wp_upgrade/#uses) | Source: [wp-admin/includes/upgrade.php:699](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L699-L699) * function[wp_new_blog_notification()](https://developer.wordpress.org/reference/functions/wp_new_blog_notification/) * Notifies the site admin that the installation of WordPress is complete. * Used by [1 function](https://developer.wordpress.org/reference/functions/wp_new_blog_notification/#used-by) | Uses [5 functions](https://developer.wordpress.org/reference/functions/wp_new_blog_notification/#uses) | Source: [wp-admin/includes/upgrade.php:575](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L575-L646) * function[wp_install()](https://developer.wordpress.org/reference/functions/wp_install/) * Installs the site. * Used by [0 functions](https://developer.wordpress.org/reference/functions/wp_install/#used-by) | Uses [22 functions](https://developer.wordpress.org/reference/functions/wp_install/#uses) | Source: [wp-admin/includes/upgrade.php:47](https://github.com/WordPress/wordpress-develop/blob/6.9.4/src/wp-admin/includes/upgrade.php#L47-L160) 1 [2](https://developer.wordpress.org/reference/files/wp-admin/includes/upgrade.php/page/2/?output_format=md) [Next Page](https://developer.wordpress.org/reference/files/wp-admin/includes/upgrade.php/page/2/?output_format=md)