wp-admin/includes/class-ftp.php:244$modeoptionalFTP_ASCII function _settype($mode=FTP_ASCII) { if($this->_ready) { if($mode==FTP_BINARY) { if($this->_curtype!=FTP_BINARY) { if(!$this->_exec("TYPE I", "SetType")) return FALSE; $this->_curtype=FTP_BINARY; } } elseif($this->_curtype!=FTP_ASCII) { if(!$this->_exec("TYPE A", "SetType")) return FALSE; $this->_curtype=FTP_ASCII; } } 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.