UpgradeTool::download PHP Метод

    function download()
    {
        $versionInfo = VersionCheck::getLatestVersion();
        if (!$versionInfo) {
            $application = PKPApplication::getApplication();
            printf("Failed to load version info from %s\n", $application->getVersionDescriptorUrl());
            exit(1);
        }
        $download = $versionInfo['package'];
        $outFile = basename($download);
        printf("Download %s: %s\n", $type, $download);
        printf("File will be saved to: %s\n", $outFile);
        if (!$this->promptContinue()) {
            exit(0);
        }
        $out = fopen($outFile, 'wb');
        if (!$out) {
            printf("Failed to open %s for writing\n", $outFile);
            exit(1);
        }
        $in = fopen($download, 'rb');
        if (!$in) {
            printf("Failed to open %s for reading\n", $download);
            fclose($out);
            exit(1);
        }
        printf('Downloading file...');
        while (($data = fread($in, 4096)) !== '') {
            printf('.');
            fwrite($out, $data);
        }
        printf("done\n");
        fclose($in);
        fclose($out);
    }