$command = var_subst($command, "SG_TEST_EXENV", "");
$command = var_subst($command, "SG_TEST_ENV", "");
$command = var_subst($command, "SG_EXENV_TEST", "");
$command = var_subst($command, "SG_TEST_EXENV", "");
$command = var_subst($command, "SG_TEST_ENV", "");
$command = var_subst($command, "SG_EXENV_TEST", "");