IOS 手机验证码的有关问题
IOS 手机验证码的问题
最近在弄一个ios app 项目，有一个问题请教
手机端 输入用户手机号码后，调用后端验证码发送程序，后端php向用户手机发送验证码短信，
请问：
如何设置短信验证码的有效期（120s）？使用session_start吗？手机发过来的好像不支持session_start，输出数据为空。
还是我哪儿弄错了，网页调试session是记录信息了的。
请各位帮忙。谢谢。
------解决思路----------------------
1.用redis expire设置120s
2. 不用session存储 验证码验证时 同时提交到后台手机号和验证码
------解决思路----------------------
可以放入数据库存储，然后调用处理。
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