mt_rand
PHP 4, PHP 5, PHP 7, PHP 8
mt_rand - Generate a random value via the Mersenne Twister Random Number Generator
mt_rand(
intmt_rand
intmin
intmax
Parameters
- min
-
Optional lowest value to be returned (default: 0)
- max
-
Optional highest value to be returned (default: mt_getrandmax)
Return Values
A random integer value between min (or 0) and max (or mt_getrandmax, inclusive), or false if max is less than min.
Notes
Warning:
min max range must be within the range mt_getrandmax. i.e. (max - min) <= mt_getrandmax Otherwise, mt_rand may return poorer random numbers than it should.
Changelog
| Version | Description |
| 7.2.0 | mt_rand has received a bug fix for a modulo bias bug. This means that sequences generated with a specific seed may differ from PHP 7.1 on 64-bit machines. |
| 7.1.0 | rand has been made an alias of mt_rand. |
| 7.1.0 | mt_rand has been updated to use the fixed, correct, version of the Mersenne Twister algorithm. To fall back to the old behaviour, use mt_srand with MT_RAND_PHP as the second parameter. |