短信驗(yàn)證碼的失效時(shí)間

1.生成驗(yàn)證碼
2.讓驗(yàn)證碼結(jié)合時(shí)間的概念，比如

• 存到緩存(redis、memcache等，以手機(jī)號(hào)為key，驗(yàn)證碼為value),設(shè)置半小時(shí)過期，最后用戶提交的時(shí)候，去看下緩存還在不在，對(duì)不對(duì)
• 存到數(shù)據(jù)庫,表結(jié)構(gòu)為phone,code，expire_time，生成數(shù)據(jù)存到數(shù)據(jù)庫，最后用戶提交去數(shù)據(jù)庫查
• 如果不是短信驗(yàn)證碼，是郵箱驗(yàn)證，還可以用郵箱、過期時(shí)間等信息加密，用戶點(diǎn)擊確認(rèn)的時(shí)候解密，確認(rèn)時(shí)間是否過期
• 想不粗來了

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Redis:setex

Redis setex

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memcached可以設(shè)置過期時(shí)間

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