Alternative of "stats_rand_gen_normal()".<?php/** * "Box–Muller transform" based random deviate generator. * * @ref https://en.wikipedia.org/wiki/Box%E2%80%93Muller_transform * * @param float|int $av Average/Mean * @param float|int $sd Standard deviation * @return float */if (! function_exists('stats_rand_gen_normal')) { function stats_rand_gen_normal($av, $sd): float { $x = mt_rand() / mt_getrandmax(); $y = mt_rand() / mt_getrandmax(); return sqrt(-2 * log($x)) * cos(2 * pi() * $y) * $sd + $av; }}?>