• 1. set expire date: 可设过期时间

• 1.First, we have to construct an ISO8601 date and set the policy document to expire by it.
  首先，我们需要创建一个ISO 8601日期，然后将它设置为策略文档的过期时间。
  dict.yoduao.com
• 2.Additionally, setting an earlier expire date, or not setting an expire date at all decreases the response time. To set the expire date for a cookie in the PHP language, use this code.
  此外，设置一个较早的expire日期或者根本不设置expire日期，会缩短响应时间。
  dict.yoduao.com

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