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生成100w个小写的英文数目字混搭的字符串，多少位才能保证不重复

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Release： 2016-06-13 11:56:27
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生成100w个小写的英文数字混搭的字符串，多少位才能保证不重复
生成100w个英文数字混搭的字符串 多少位怎么写才能最大限度保证不重复 请教一下
------解决方案--------------------
哦，没注意你只能是小写字母
那就是
pow(36, 4) = 1679616
也还是能够满足的

Related labels：
100W nbsp pow
source：php.cn
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