wp-includes/ms-load.php:527This deprecated function formerly set the site_name property of the $current_site object.
$current_siteWP_NetworkWP_Networkfunction get_current_site_name( $current_site ) { _deprecated_function( __FUNCTION__, '3.9.0', 'get_current_site()' ); return $current_site;}Introduced in 3.0.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ms-load.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.