php 执行存储过程返回值得有关问题？

declare vCNC_ID int;
  set vCnt=0;
  SELECT count(trlm.TRAVELER_ID) into vCnt from tr_traveler_lot_master trlm
   WHERE trlm.ORGANIZATION_ID=pOrg_ID AND trlm.SITE_ID=pSite_id
     AND trlm.TRAVELER_CODE=pTraveler_code;
  IF ISNULL(vCnt)=0 and vCnt>0 THEN
     SELECT trlm.TRAVELER_ID into vTraveler_id from tr_traveler_lot_master trlm
      WHERE trlm.ORGANIZATION_ID=pOrg_ID AND trlm.SITE_ID=pSite_id
        AND trlm.TRAVELER_CODE=pTraveler_code;
  ELSE
      SELECT '错误的托盘ID.....!';
      -- SELECT 'No Traveler ID issued.....!';
      LEAVE proc_main;
  END IF;
  set vCnt=0;
  SELECT count(trll.TRAVELER_ID) into vCnt from tr_traveler_lot_logging trll
   WHERE trll.ORGANIZATION_ID=pOrg_ID AND trll.SITE_ID=pSite_id
     AND trll.TRAVELER_ID=vTraveler_id and TRANSACTION_CODE<9;
  IF ISNULL(vCnt)=0 and vCnt>0 THEN
     SELECT '托盘ID已经开始.....!';
     -- SELECT 'Traveler ID had been started.....!';
     LEAVE proc_main;
  ELSE
     SELECT CNC_ID into vCNC_ID FROM tr_cnc_master tcm where tcm.ORGANIZATION_ID=pOrg_id and tcm.CNC_CODE= pCNC_CODE;
  END IF;  -- Second Count
--  Check CNC is in running by other Tray
  set vCnt=0;
  SELECT count(trll.TRAVELER_ID) into vCnt from tr_traveler_lot_logging trll
   WHERE trll.ORGANIZATION_ID=pOrg_ID AND trll.SITE_ID=pSite_id
     AND trll.CNC_ID=vCNC_ID and TRANSACTION_CODE<9;
  IF ISNULL(vCnt)=0 and vCnt>0 THEN
     SELECT 'ABCID已经开始被其他托盘使用.....!';
     -- SELECT 'CNC ID had been started by other tray.....!';
     LEAVE proc_main;
  END IF;  --  Check CNC is in running by other Tray
  -- Check CNC load Program or not
  set vCnt=0;
  SELECT count(tch.CNC_ID) into vCnt from  tr_cnc_header tch
   WHERE tch.ORGANIZATION_ID=pOrg_ID AND tch.CNC_ID=vCNC_ID;
  IF ISNULL(vCnt)=0 and vCnt>0 THEN
     SELECT CNC_ID into vCNC_ID FROM tr_cnc_master tcm where tcm.ORGANIZATION_ID=pOrg_id and tcm.CNC_CODE= pCNC_CODE;
     call Traveler_LogCreation (pOrg_id,vTraveler_id,pSite_ID,1,sysdate(),vCNC_id,pUser);
  ELSE
     SELECT '无 ABC 程序配置.....!';
     -- SELECT 'No CNC program loaded.....!';
     LEAVE proc_main;
  END IF;  -- Third Count     
  SELECT 'Ok';
end proc_main