Piwik\SettingsPiwik::checkPiwikServerWorking PHP Method

    public static function checkPiwikServerWorking($piwikServerUrl, $acceptInvalidSSLCertificates = false)
    {
        // Now testing if the webserver is running
        try {
            $fetched = Http::sendHttpRequestBy('curl', $piwikServerUrl, $timeout = 45, $userAgent = null, $destinationPath = null, $file = null, $followDepth = 0, $acceptLanguage = false, $acceptInvalidSSLCertificates);
        } catch (Exception $e) {
            $fetched = "ERROR fetching: " . $e->getMessage();
        }
        // this will match when Piwik not installed yet, or favicon not customised
        $expectedStringAlt = 'plugins/CoreHome/images/favicon.png';
        // this will match when Piwik is installed and favicon has been customised
        $expectedString = 'misc/user/';
        // see checkPiwikIsNotInstalled()
        $expectedStringAlreadyInstalled = 'piwik-is-already-installed';
        $expectedStringNotFound = strpos($fetched, $expectedString) === false && strpos($fetched, $expectedStringAlt) === false && strpos($fetched, $expectedStringAlreadyInstalled) === false;
        $hasError = false !== strpos($fetched, PAGE_TITLE_WHEN_ERROR);
        if ($hasError || $expectedStringNotFound) {
            throw new Exception("\nPiwik should be running at: " . $piwikServerUrl . " but this URL returned an unexpected response: '" . $fetched . "'\n\n");
        }
    }

function checkPiwikSetupForTests()
{
    if (empty($_SERVER['REQUEST_URI']) || $_SERVER['REQUEST_URI'] == '@REQUEST_URI@') {
        echo "WARNING: for tests to pass, you must first:\n1) Install webserver on localhost, eg. apache\n2) Make these Piwik files available on the webserver, at eg. http://localhost/dev/piwik/\n3) Install Piwik by going through the installation process\n4) Copy phpunit.xml.dist to phpunit.xml\n5) Edit in phpunit.xml the @REQUEST_URI@ and replace with the webserver path to Piwik, eg. '/dev/piwik/'\n\nTry again.\n-> If you still get this message, you can work around it by specifying Host + Request_Uri at the top of this file tests/PHPUnit/bootstrap.php. <-";
        exit(1);
    }
    $baseUrl = \Piwik\Tests\Framework\Fixture::getRootUrl();
    \Piwik\SettingsPiwik::checkPiwikServerWorking($baseUrl, $acceptInvalidSSLCertificates = true);
}