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                ### 帶參數的二維碼 帶參數的二維碼,即生成公眾號二維碼并帶上指定參數(也叫場景值),在用戶掃碼并關注眾號時,會觸發事件并獲取到之前指定的參數,從而實現推廣跟蹤的目的,該功能廣泛應用于帳號推廣等應用場景。 ```php use shuipf\wechat\wechat\Qrcode; $qrcode = new Qrcode($accessToken); ``` ### 緩存二維碼票據 ```php $qrcode->setCache($cacheDriver); ``` ### 臨時二維碼 臨時二維碼默認有效期為 ``2592000`` 秒(30 天),可傳入第二個參數指定有效期,正如下面示例中,我們設置場景值和有效期(可選)分別為 ``1113`` 和 ``3600`` 秒: ```php echo sprintf('<img src="%s" />', $qrcode->getTemporary(1113, 3600)); ``` ### 永久二維碼 ```php echo sprintf('<img src="%s" />', $qrcode->getForever(1113)); ``` 也可以傳入字符串參數: ```php echo sprintf('<img src="%s" />', $qrcode->getForever('hello')); ```
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