wp-admin/includes/class-ftp.php:359$forceoptionalfalse function quit($force=false) { if($this->_ready) { if(!$this->_exec("QUIT") and !$force) return FALSE; if(!$this->_checkCode() and !$force) return FALSE; $this->_ready=false; $this->SendMSG("Session finished"); } $this->_quit(); return TRUE; }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-ftp.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.