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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
                **簡介** 在做商城項目的時候通常會用到生成訂單號,下面是我常用的一個訂單號方法。 ``` /** * @return string 訂單號 */ function makeOrderNo() { $yCode = array('A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J'); $orderSn = $yCode[intval(date('Y')) - 2018] . strtoupper(dechex(date('m'))) . date('d') . substr(time(), -5) .substr(microtime(), 2, 5) . sprintf('%02d', rand(0, 99)); return $orderSn; } ``` 再好的訂單號生成都會有重復的可能,在我們數據庫建表的時候就應該給訂單號創建索引,再生成訂單號后應查詢數據庫,查看是否重復,否則重新生成訂單號,可以配合遞歸使用。
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