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                需要使用緩存存儲數據時,首先引入緩存命名空間 ~~~ use System\Cache ~~~ ## 寫入緩存 ~~~ $key = 'goods:1'; $goods = ['goods_id' => 1, 'goods_name' => '愛他美奶粉', 'price' => 110]; Cache::set($key, $goods); ~~~ 寫入帶過期時間的緩存 ~~~ $key = 'goods:1'; $goods = ['goods_id' => 1, 'goods_name' => '愛他美奶粉', 'price' => 110]; $expire = 3600; // 3600 秒后失效 Cache::set($key, $goods, $expire); ~~~ ## 讀取緩存內容 ~~~ $key = 'goods:1'; $goods = Cache::get($key); // 緩存不存在或已過期時返回 false if ($goods !== false) echo $goods['goods_name']; ~~~ ## 判斷緩存是否存在 已過期的緩存視為不存在 ~~~ $key = 'goods:1'; if (Cache::has($key) ) { echo '緩存存在'; } else { echo '緩存不存在'; } ~~~ ## 刪除緩存 ~~~ $key = 'goods:1'; Cache::delete($key); ~~~ 清除全部緩存 ~~~ Cache::flush(); ~~~ ## 計數器自增 ~~~ $key = 'goods:1:hits'; Cache::increment($key); // 將商品1的點擊量增加一個,尚無緩存記錄時默認從0開始自增 Cache::increment($key, 10); // 點擊量增加10個 ~~~ ## 計數器自減 例如開發秒殺系統,將庫存存放在Redis緩存中,可以用Redis的高效IO 獲得較高的并發負載量 ~~~ $key = 'goods:1:stock'; Cache::set($key, 100); ~~~ 用戶秒殺時 ~~~ $key = 'goods:1:stock'; Cache::decrement($key); // 將商品1的庫存減1個 Cache::decrement($key, 3); // 將商品1的庫存減3個 ~~~ ## 關于緩存鍵名 鍵名可以自定義,實際開發中我們常用 冒號(:)分隔的多個單詞作為鍵名,主要的原因是因為很多情況下我們用Redis作為緩存實現, Redis管理工具默認使用冒號(:)作為分隔符,每一級冒號作為一層目錄處理。
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