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This article mainly explains "how to use the php function mt_rand". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Now let the editor take you to learn how to use the php function mt_rand.

Mt_rand is the function that started with php4.2.0, which is used to generate better random numbers, using syntax such as "mt_rand (): int" or "mt_rand (int $min, int $max): int".

This article operating environment: Windows7 system, PHP7.4 version, Dell G3 computer.

Mt_rand is a function that php started with.

Since PHP 4.2.0, it is no longer necessary to sow the random number generator with the srand () or mt_srand () function, and it is now done automatically. In versions prior to 3.0.7, max meant range. To get random numbers from 5 to 15 in these versions, the short example is mt_rand (5,11).

Mt_rand

(PHP 4, PHP 5, PHP 7, PHP 8)

Mt_rand-generate better random numbers

Description

Mt_rand (): intmt_rand (int $min, int $max): int

Many old libc random number generators have some uncertain and unknown characteristics and are very slow. The rand () function of PHP uses the libc random number generator by default. The mt_rand () function is used informally to replace it. This function uses the properties known in »Mersenne Twister as the random number generator, which can generate random values at an average speed of four times faster than the rand () provided by libc.

Returns a pseudorandom number between 0 and mt_getrandmax () if the optional arguments min and max,mt_rand () are not provided. For example, if you want a random number between 5 and 15, including 5 and 15, use mt_rand (5,15).

Parameters.

Min

Optional, returned minimum value (default: 0)

Max

Optional, maximum value returned (default: mt_getrandmax ())

Return value

Returns a random integer from min (or 0) to max (or to mt_getrandmax (), including this value).

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