RobRichards\XMLSecLibs\XMLSecurityKey::getX509Certificate PHP Method

Will return the X509 certificate in PEM-format if this key represents an X509 certificate.

public getX509Certificate ( ) : string
return	string	The X509 certificate or null if this key doesn't represent an X509-certificate.

    public function getX509Certificate()
    {
        return $this->x509Certificate;
    }

XMLSecurityKey