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                使用瞬間緩存做數據交換 ``` set_transient() // 保存一個臨時數據到緩存中 get_transient() // 從緩存中獲取一個臨時數據 delete_transient() // 從緩存中刪除一個臨時數據 ``` ***** > 舉例, > 用戶ID:100已支付 ``` if(is_paid){ set_transient(id,'支付訂單號等唯一數字','30秒');//將用戶ID和訂單信息綁定作為緩存進行存儲 } ``` > 然后需要對支付狀態進行檢查的時候 ``` if( false !== get_transient(id) && get_transient(id) == '支付訂單號等唯一數字'){ echo '數據庫存在這個數據值,判定已經支付完成了'; delete_transient(id);//用完了之后,這個值就可以刪除了,雖然會自動過期刪除的 } ```
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