wp-includes/rss.php:761$url function get ($url) { $this->ERROR = ""; $cache_option = 'rss_' . $this->file_name( $url ); if ( ! $rss = get_transient( $cache_option ) ) { $this->debug( "Cache does not contain: $url (cache option: $cache_option)" ); return 0; } return $rss; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/rss.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.