OneLogin_Saml2_Utils::generateUniqueID PHP Method

    public static function generateUniqueID()
    {
        return 'ONELOGIN_' . sha1(uniqid(mt_rand(), true));
    }

    /**
     * Constructs the Logout Request object.
     *
     * @param OneLogin_Saml2_Settings $settings Settings
     */
    public function __construct(OneLogin_Saml2_Settings $settings)
    {
        $this->_settings = $settings;
        $spData = $this->_settings->getSPData();
        $idpData = $this->_settings->getIdPData();
        $security = $this->_settings->getSecurityData();
        $id = OneLogin_Saml2_Utils::generateUniqueID();
        $nameIdValue = OneLogin_Saml2_Utils::generateUniqueID();
        $issueInstant = OneLogin_Saml2_Utils::parseTime2SAML(time());
        $key = null;
        if (isset($security['nameIdEncrypted']) && $security['nameIdEncrypted']) {
            $key = $idpData['x509cert'];
        }
        $nameId = OneLogin_Saml2_Utils::generateNameId($nameIdValue, $spData['entityId'], $spData['NameIDFormat'], $key);
        $logoutRequest = <<<LOGOUTREQUEST
<samlp:LogoutRequest
    xmlns:samlp="urn:oasis:names:tc:SAML:2.0:protocol"
    xmlns:saml="urn:oasis:names:tc:SAML:2.0:assertion"
    ID="{$id}"
    Version="2.0"
    IssueInstant="{$issueInstant}"
    Destination="{$idpData['singleLogoutService']['url']}">
    <saml:Issuer>{$spData['entityId']}</saml:Issuer>
    {$nameId}
</samlp:LogoutRequest>
LOGOUTREQUEST;
        $this->_logoutRequest = $logoutRequest;
    }