php生成總值固定隨機數字陣列
阿新 • • 發佈:2018-12-15
簡介
php程式碼生成數字陣列,所有數字總和固定private function _getRandomNumberArray($total, $times, $min, $max) { $data = array(); if ($min * $times > $total) { return array(); } if ($max * $times < $total) { return array(); } while ($times >= 1) { $times--; $kmix = max($min, $total - $times * $max); $kmax = min($max, $total - $times * $min); $kAvg = $total / ($times + 1); //獲取最大值和最小值的距離之間的最小值 $kDis = min($kAvg - $kmix, $kmax - $kAvg); //獲取0到1之間的隨機數與距離最小值相乘得出浮動區間,這使得浮動區間不會超出範圍 $r = ((float)(rand(1, 10000) / 10000) - 0.5) * $kDis * 2; $k = round($kAvg + $r); $total -= $k; $data[] = $k; } return $data; }
檢視原文:https://www.huuinn.com/archives/613
更多技術乾貨:風勻坊
關注公眾號:風勻坊