wp-admin/includes/class-ftp.php:420$from$to function rename($from, $to) { if(!$this->_exec("RNFR ".$from, "rename")) return FALSE; if(!$this->_checkCode()) return FALSE; if($this->_code==350) { if(!$this->_exec("RNTO ".$to, "rename")) return FALSE; if(!$this->_checkCode()) return FALSE; } else return FALSE; 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.