(PECL stats >= 1.0.0)
stats_rand_gen_gamma — Generates a random deviate from the gamma distribution
$a, float $r): floatGenerates a random deviate from the gamma distribution whose density is (A**R)/Gamma(R) * X**(R-1) * Exp(-A*X).
a
location parameter of Gamma distribution (a
> 0).
r
shape parameter of Gamma distribution (r >
0).
A random deviate