OneLogin_Saml2_Utils::setBaseURL PHP Method

    public static function setBaseURL($baseurl)
    {
        if (!empty($baseurl)) {
            $baseurlpath = '/';
            if (preg_match('#^https?:\\/\\/([^\\/]*)\\/?(.*)#i', $baseurl, $matches)) {
                if (strpos($baseurl, 'https://') === false) {
                    self::setSelfProtocol('http');
                    $port = '80';
                } else {
                    self::setSelfProtocol('https');
                    $port = '443';
                }
                $currentHost = $matches[1];
                if (false !== strpos($currentHost, ':')) {
                    list($currentHost, $possiblePort) = explode(':', $matches[1], 2);
                    if (is_numeric($possiblePort)) {
                        $port = $possiblePort;
                    }
                }
                if (isset($matches[2]) && !empty($matches[2])) {
                    $baseurlpath = $matches[2];
                }
                self::setSelfHost($currentHost);
                self::setSelfPort($port);
                self::setBaseURLPath($baseurlpath);
            }
        }
    }

    /**
     * Constructs the Logout Request object.
     *
     * @param OneLogin_Saml2_Settings $settings     Settings
     * @param string|null             $request      A UUEncoded Logout Request.
     * @param string|null             $nameId       The NameID that will be set in the LogoutRequest.
     * @param string|null             $sessionIndex The SessionIndex (taken from the SAML Response in the SSO process).
     * @param string|null             $nameIdFormat The NameID Format will be set in the LogoutRequest.
     */
    public function __construct(OneLogin_Saml2_Settings $settings, $request = null, $nameId = null, $sessionIndex = null, $nameIdFormat = null)
    {
        $this->_settings = $settings;
        $baseURL = $this->_settings->getBaseURL();
        if (!empty($baseURL)) {
            OneLogin_Saml2_Utils::setBaseURL($baseURL);
        }
        if (!isset($request) || empty($request)) {
            $spData = $this->_settings->getSPData();
            $idpData = $this->_settings->getIdPData();
            $security = $this->_settings->getSecurityData();
            $id = OneLogin_Saml2_Utils::generateUniqueID();
            $this->id = $id;
            $nameIdValue = OneLogin_Saml2_Utils::generateUniqueID();
            $issueInstant = OneLogin_Saml2_Utils::parseTime2SAML(time());
            $cert = null;
            if (isset($security['nameIdEncrypted']) && $security['nameIdEncrypted']) {
                $cert = $idpData['x509cert'];
            }
            if (!empty($nameId)) {
                if (empty($nameIdFormat)) {
                    $nameIdFormat = $spData['NameIDFormat'];
                }
                $spNameQualifier = null;
            } else {
                $nameId = $idpData['entityId'];
                $nameIdFormat = OneLogin_Saml2_Constants::NAMEID_ENTITY;
                $spNameQualifier = $spData['entityId'];
            }
            $nameIdObj = OneLogin_Saml2_Utils::generateNameId($nameId, $spNameQualifier, $nameIdFormat, $cert);
            $sessionIndexStr = isset($sessionIndex) ? "<samlp:SessionIndex>{$sessionIndex}</samlp:SessionIndex>" : "";
            $logoutRequest = <<<LOGOUTREQUEST
<samlp:LogoutRequest
    xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
    xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
    ID="{$id}"
    Version="2.0"
    IssueInstant="{$issueInstant}"
    Destination="{$idpData['singleLogoutService']['url']}">
    <saml:Issuer>{$spData['entityId']}</saml:Issuer>
    {$nameIdObj}
    {$sessionIndexStr}
</samlp:LogoutRequest>
LOGOUTREQUEST;
        } else {
            $decoded = base64_decode($request);
            // We try to inflate
            $inflated = @gzinflate($decoded);
            if ($inflated != false) {
                $logoutRequest = $inflated;
            } else {
                $logoutRequest = $decoded;
            }
            $this->id = self::getID($logoutRequest);
        }
        $this->_logoutRequest = $logoutRequest;
    }