(PHP 7)
Sets the RNG seed
mixed gmp_random_seed ( mixed $seed )
Parameters:
seed
The seed to be set for the gmp_random(), gmp_random_bits(), and gmp_random_range() functions.
Either a GMP number resource in PHP 5.5 and earlier, a GMP object in PHP 5.6 and later, or a numeric string provided that it is possible to convert the latter to a number.
Returns:
Returns NULL
on success.
Exception:
Issues an E_WARNING
and returns FALSE
if seed
is not valid.
Examples:
gmp_random_seed() example
<?php // set the seed gmp_random_seed(100); var_dump(gmp_strval(gmp_random(1))); // set the seed to something else gmp_random_seed(gmp_init(-100)); var_dump(gmp_strval(gmp_random_bits(10))); // set the seed to something invalid var_dump(gmp_random_seed('not a number'));
The above example will output:
string(20) "15370156633245019617" string(3) "683" Warning: gmp_random_seed(): Unable to convert variable to GMP - string is not an integer in %s on line %d bool(false)
See also:
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