Test if ‘file_uploads’ directive in PHP.ini is turned off.
WP_Site_Health::get_test_rest_availability
Test if the REST API is accessible.
WP_Site_Health::get_test_http_requests
Test if HTTP requests are blocked.
WP_Site_Health::get_test_loopback_requests
Test if loopbacks work as expected.
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WP_Site_Health::get_test_plugin_theme_auto_updates
Test if plugin and theme auto-updates appear to be configured correctly.
WP_Site_Health::get_test_background_updates
Test if WordPress can run automated background updates.
WP_Site_Health::get_test_scheduled_events
Test if scheduled events run as intended.
WP_Site_Health::get_test_ssl_support
Check if the HTTP API can handle SSL/TLS requests.
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WP_Site_Health::get_test_https_status
Test if your site is serving content over HTTPS.
WP_Site_Health::get_test_is_in_debug_mode
Test if debug information is enabled.
WP_Site_Health::get_test_dotorg_communication
Test if the site can communicate with WordPress.org.
WP_Site_Health::get_test_utf8mb4_support
Test if the database server is capable of using utf8mb4.
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WP_Site_Health::get_test_sql_server
Test if the SQL server is up to date.
WP_Site_Health::get_test_php_sessions
Test if there’s an active PHP session that can affect loopback requests.
WP_Site_Health::get_test_php_default_timezone
Test if the PHP default timezone is set to UTC.