Prado\Web\UI\WebControls\TFileUpload::saveAs PHP Method

    public function saveAs($fileName, $deleteTempFile = true)
    {
        if ($this->_errorCode === UPLOAD_ERR_OK) {
            if ($deleteTempFile) {
                return move_uploaded_file($this->_localName, $fileName);
            } else {
                if (is_uploaded_file($this->_localName)) {
                    return file_put_contents($fileName, file_get_contents($this->_localName)) !== false;
                } else {
                    return false;
                }
            }
        } else {
            return false;
        }
    }

    /**
     * This method is invoked when a file is uploaded.
     * If you override this method, be sure to call the parent implementation to ensure
     * the invocation of the attached event handlers.
     * @param TEventParameter event parameter to be passed to the event handlers
     */
    public function onFileUpload($param)
    {
        if ($this->_flag->getValue() && $this->getPage()->getIsPostBack() && $param == $this->_target->getUniqueID()) {
            // save the file so that it will persist past the end of this return.
            $localName = str_replace('\\', '/', tempnam(Prado::getPathOfNamespace($this->getTempPath()), ''));
            parent::saveAs($localName);
            $this->_localName = $localName;
            $params = new TActiveFileUploadCallbackParams();
            $params->localName = $localName;
            $params->fileName = addslashes($this->getFileName());
            $params->fileSize = $this->getFileSize();
            $params->fileType = $this->getFileType();
            $params->errorCode = $this->getErrorCode();
            // return some javascript to display a completion status.
            echo <<<EOS
<script language="Javascript">
\tOptions = new Object();
\tOptions.clientID = '{$this->getClientID()}';
\tOptions.targetID = '{$this->_target->getUniqueID()}';
\tOptions.fileName = '{$params->fileName}';
\tOptions.fileSize = '{$params->fileSize}';
\tOptions.fileType = '{$params->fileType}';
\tOptions.errorCode = '{$params->errorCode}';
\tOptions.callbackToken = '{$this->pushParamsAndGetToken($params)}';
\tparent.Prado.WebUI.TActiveFileUpload.onFileUpload(Options);
</script>
EOS;
            exit;
        }
    }