wp-admin/includes/upgrade.php:2360Executes changes made in WordPress 6.4.0.
function upgrade_640() { global $wp_current_db_version; if ( $wp_current_db_version < 56657 ) { // Enable attachment pages. update_option( 'wp_attachment_pages_enabled', 1 ); // Remove the wp_https_detection cron. Https status is checked directly in an async Site Health check. $scheduled = wp_get_scheduled_event( 'wp_https_detection' ); if ( $scheduled ) { wp_clear_scheduled_hook( 'wp_https_detection' ); } }}Introduced in 6.4.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/upgrade.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.