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2022-05-25 10:13:10
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随机生成6位数：discuz的salt用到：```字符串：substr(uniqid(rand()), -6);字 符：substr(uniqid(rand(), true), -6);```
随机生成6位数：discuz的salt用到：```字符串：substr(uniqid(rand()), -6);字 符：substr(uniqid(rand(), true), -6);```