PHP rand()与random_int() [英] PHP rand() vs. random_int()

问题描述

php.net表示: random_int()函数生成密码安全的伪随机整数.

但是，有人可以解释rand()和& amp;之间的区别吗? random_int()?仅需要随机整数时，可以使用random_int()代替rand()吗?哪一个更快?

But, Can someone explain whats the difference between rand() & random_int()? Can I use random_int() instead of rand() when only requiring a random integer? Which one is faster?

推荐答案

重新查看问题并看到给出了答案，我发现我将自己的评论提交给答案，并且认为之前已经提交过，这是很公平的.

Revisiting the question and seeing there's been an answer given, I find it's only fair that I submit my comments to an answer, seeing they were submitted before.

有关PHP 7 random_int()函数的手册指出:

The manual on PHP 7's random_int() function states:

返回介于min到max之间(包括端值)的加密安全随机整数."

• http://php.net/manual/en/function.random- int.php
• http://php.net/manual/en/function.random-int.php

和rand()

*此函数不会生成加密安全值" *

*This function does not generate cryptographically secure values" *

• http://php.net/manual/en/function.rand.php
• http://php.net/manual/en/function.rand.php

OP的评论:

"@ Fred-ii-谢谢.但是，加密安全的伪随机"是什么意思?– NDFA"

根据我的发现，可以在以下链接中找到

That can be found in the following links as per my findings:

• https://en.wikipedia.org/wiki/Cryptographically_secure_pseudorandom_number_generator

哪个州:

密码安全的伪随机数生成器(CSPRNG)或密码伪伪随机数生成器(CPRNG)[1]是伪随机数生成器(PRNG)，其属性使其适合用于密码学

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• 加密安全的随机数生成器如何工作?

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• How does a cryptographically secure random number generator work?

关于性能，您需要自己运行基准测试.

In regards to performance, you will need to run a benchmark yourself.

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