wp-includes/blocks/calendar.php:108Returns whether or not there are any published posts.
boolfunction block_core_calendar_has_published_posts() { // Multisite already has an option that stores the count of the published posts. // Let's use that for multisites. if ( is_multisite() ) { return 0 < (int) get_option( 'post_count' ); } // On single sites we try our own cached option first. $has_published_posts = get_option( 'wp_calendar_block_has_published_posts', null ); if ( null !== $has_published_posts ) { return (bool) $has_published_posts; } // No cache hit, let's update the cache and return the cached value. return block_core_calendar_update_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.