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                ThinkChat2.0新版上線,更智能更精彩,支持會話、畫圖、視頻、閱讀、搜索等,送10W Token,即刻開啟你的AI之旅 廣告
                ``` https://blog.csdn.net/weixin_39893205/article/details/111656809?depth_1-utm_source=distribute.pc_relevant_bbs_down.none-task--2~all~first_rank_v2~rank_v29-6.nonecase ``` ``` https://blog.csdn.net/qq_37970345/article/details/72832093?dist_request_id=1328603.60642.16152114426255623&depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromMachineLearnPai2-2.control namespace app\\index\\controller; use think\\Controller; use think\\Cache; class Index extends Controller { ? ? /\*\* ? ? ?\* 首頁 ? ? ?\* \*/ ? ? public function index(){ ? ? ? ? $fp = fopen("lock.txt", "w+"); ? ? ? ? if(flock($fp,LOCK_EX)) ? //鎖定當前指針,,, ? ? ? ? { ? ? ? ? ? ? //..處理訂單 ? ? ? ? ? ? $stock = $this->findStock(); ? ? ? ? ? ? if($stock > 0){ ? ? ? ? ? ? ? ? $this->setDec(); ? ? ? ? ? ? }else{ ? ? ? ? ? ? ? ? return '搶購失敗'; ? ? ? ? ? ? } ? ? ? ? ? ? return $stock; ? ? ? ? ? ? flock($fp,LOCK_UN); ? ? ? ? } ? ? ? ? fclose($fp); ? ? } ? ? /\*\* ? ? ?\* 查詢數據庫庫存 ? ? ?\* \*/ ? ? public function findStock(){ ? ? ? ? $res = db('info')->where('id',1)->field('stock')->lock(true)->find(); ? ? ? ? return $res['stock']; ? ? } ? ? /\*\* ? ? ?\* 減少庫存操作 ? ? ?\* \*/ ? ? public function setDec(){ ? ? ? ? $res = db('info')->where('id',1)->setDec('stock',1); ? ? ? ? return $res; ? ? } } ```
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