wp-includes/blocks/calendar.php:135Queries the database for any published post and saves a flag whether any published post exists or not.
boolfunction block_core_calendar_update_has_published_posts() { global $wpdb; $has_published_posts = (bool) $wpdb->get_var( "SELECT 1 as test FROM {$wpdb->posts} WHERE post_type = 'post' AND post_status = 'publish' LIMIT 1" ); update_option( 'wp_calendar_block_has_published_posts', $has_published_posts ); return $has_published_posts;}Introduced in 5.9.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/blocks/calendar.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.