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This article mainly shows you how to use mt_rand to generate random numbers in PHP. The content is simple and easy to understand. I hope it can help you solve your doubts. Let Xiaobian lead you to study and learn how to use mt_rand to generate random numbers in PHP.

mt_rand generates random numbers

Many of the older libc random number generators have uncertain and unknown properties and are slow. PHP's rand() function uses the libc random number generator by default. The mt_rand() function is used informally to replace it. This function uses the known properties of » Mersenne Twister as a random number generator, which can generate random numbers four times faster on average than the rand() provided by libc. It is strongly recommended that mt_rand function be used instead of rand during development.

If the optional parameters min and max are not provided, mt_rand() returns a pseudo-random number between 0 and mt_getrandmax(). For example, if you want a random number between 3 and 20 (inclusive), use mt_rand(3, 20).

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