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srand

PHP function Edit on GitHub ✎

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

Seed the random number generator

Description

srand(int|null $seed = null, int $mode = MT_RAND_MT19937): void

Seeds the random number generator with seed or with a random value if no seed is given.

Randomseed Mt19937-tiny-seed

Note

As of PHP 7.1.0, srand() has been made an alias of mt_srand().

seed

Fills the state with values generated with a linear congruential generator that was seeded with seed interpreted as an unsigned 32 bit integer.

If seed is omitted or null, a random unsigned 32-bit integer will be used.

Void

Version	Description
8.3.0	`seed` is now nullable.
7.1.0	`srand()`has been made an alias of `mt_srand()`.