PHPUnit_TextUI_Command::handleVersionCheck PHP Method

    protected function handleVersionCheck()
    {
        $this->printVersionString();
        $latestVersion = file_get_contents('https://phar.phpunit.de/latest-version-of/phpunit');
        $isOutdated = version_compare($latestVersion, PHPUnit_Runner_Version::id(), '>');
        if ($isOutdated) {
            print "You are not using the latest version of PHPUnit.\n";
            print 'Use "phpunit --self-upgrade" to install PHPUnit ' . $latestVersion . "\n";
        } else {
            print "You are using the latest version of PHPUnit.\n";
        }
        exit(PHPUnit_TextUI_TestRunner::SUCCESS_EXIT);
    }