OneLogin_Saml2_Settings::getSPMetadata PHP Method

    public function getSPMetadata()
    {
        $metadata = OneLogin_Saml2_Metadata::builder($this->_sp, $this->_security['authnRequestsSigned'], $this->_security['wantAssertionsSigned'], null, null, $this->getContacts(), $this->getOrganization());
        $cert = $this->getSPcert();
        if (!empty($cert)) {
            $metadata = OneLogin_Saml2_Metadata::addX509KeyDescriptors($metadata, $cert, $this->_security['wantNameIdEncrypted'] || $this->_security['wantAssertionsEncrypted']);
        }
        //Sign Metadata
        if (isset($this->_security['signMetadata']) && $this->_security['signMetadata'] !== false) {
            if ($this->_security['signMetadata'] === true) {
                $keyMetadata = $this->getSPkey();
                $certMetadata = $cert;
                if (!$keyMetadata) {
                    throw new OneLogin_Saml2_Error('SP Private key not found.', OneLogin_Saml2_Error::PRIVATE_KEY_FILE_NOT_FOUND);
                }
                if (!$certMetadata) {
                    throw new OneLogin_Saml2_Error('SP Public cert not found.', OneLogin_Saml2_Error::PUBLIC_CERT_FILE_NOT_FOUND);
                }
            } else {
                if (!isset($this->_security['signMetadata']['keyFileName']) || !isset($this->_security['signMetadata']['certFileName'])) {
                    throw new OneLogin_Saml2_Error('Invalid Setting: signMetadata value of the sp is not valid', OneLogin_Saml2_Error::SETTINGS_INVALID_SYNTAX);
                }
                $keyFileName = $this->_security['signMetadata']['keyFileName'];
                $certFileName = $this->_security['signMetadata']['certFileName'];
                $keyMetadataFile = $this->_paths['cert'] . $keyFileName;
                $certMetadataFile = $this->_paths['cert'] . $certFileName;
                if (!file_exists($keyMetadataFile)) {
                    throw new OneLogin_Saml2_Error('SP Private key file not found: %s', OneLogin_Saml2_Error::PRIVATE_KEY_FILE_NOT_FOUND, array($keyMetadataFile));
                }
                if (!file_exists($certMetadataFile)) {
                    throw new OneLogin_Saml2_Error('SP Public cert file not found: %s', OneLogin_Saml2_Error::PUBLIC_CERT_FILE_NOT_FOUND, array($certMetadataFile));
                }
                $keyMetadata = file_get_contents($keyMetadataFile);
                $certMetadata = file_get_contents($certMetadataFile);
            }
            $signatureAlgorithm = $this->_security['signatureAlgorithm'];
            $metadata = OneLogin_Saml2_Metadata::signMetadata($metadata, $keyMetadata, $certMetadata, $signatureAlgorithm);
        }
        return $metadata;
    }

 /**
  * Returns the metadata of this Service Provider in xml.
  * @return string Metadata in xml
  * @throws \Exception
  * @throws \OneLogin_Saml2_Error
  */
 public function getMetadata()
 {
     $oneLoginSetting = new \OneLogin_Saml2_Settings($this->config, true);
     $metadata = $oneLoginSetting->getSPMetadata();
     $errors = $oneLoginSetting->validateMetadata($metadata);
     if (!empty($errors)) {
         throw new \Exception('Invalid Metadata Service Provider');
     }
     return $metadata;
 }