<?php/ * @param $total [你要發(fā)的紅包總額] * @param int $num [發(fā)幾個(gè)] @return array [生成紅包金額] /function getRedGift($total, $num = 10) {
$min = 0.01;//最小的紅包金額$wamp = array();
$returnData = array();
for ($i = 1; $i < $num; $i++) {
  $safe_total = ($total - ($num - $i) * $min) / ($num - $i); //當(dāng)前允許紅包金額的最大值if ($safe_total < 0) {//如果紅金金額的最大值小于0就跳出循環(huán)break; 
  }
  $money = @mt_rand($min * 100, $safe_total * 100) / 100; //隨機(jī)產(chǎn)生一個(gè)紅包金額, mt_rand(min,max)是生成min到max的隨機(jī)整數(shù),包含min和max,所以為了生成的紅包金額有小數(shù),所以*100先,再100$total = $total - $money; //剩余紅包總額$wamp[$i] = round($money, 2); //保留兩位有效數(shù)字}
$wamp[$i] = round($total, 2);//最后一個(gè)紅包金額$returnData['MoneySum'] = $wamp;
$returnData['newTotal'] = array_sum($wamp);//array_sum是計(jì)算數(shù)組中所有值的和 return $returnData;
}
//測(cè)試$data = getRedGift(100, 10);
echo '<pre>';
print_r($data);
?>