PECL stats_rand_gen_normal always returns the same value

Question

With PHP 7.3, I'm trying to use the PECL stats extension: https://pecl.php.net/package/stats

Especially, I'm interested in generating random values following a normal distribution, with the function stats_rand_gen_normal

In my script, the function always returns the same result. I tried in CLI, to be sure :

php -r "echo(stats_rand_gen_normal(0,1));"

Every execution prints the same number.

So it's a random value which is always the same... What am I missing here?

score 2 · Accepted Answer · answered Jun 29 '19 at 15:14

2

This seems to me like a bug too and I have make a bug report. There is a solution on stackoverflow using a custom function.

answered Jun 29 '19 at 15:14

Siad Ardroumli

score 1 · Answer 2 · answered Apr 13 '20 at 18:03

1

You should use stats_rand_setall() to seed values to the random generator.

answered Apr 13 '20 at 18:03

Vitaly Chirkov

2 Answers2