代码:
<?php
//* @param $total [你要发的红包总额] * @param int $num [发几个] @return array [生成红包金额]
function getRedGift($total, $num = 10) {
$min = 0.01; //最小的红包金额
$wamp = array();
$returnData = array();
for ($i = 1; $i < $num; $i++) {
$safe_total = ($total - ($num - $i) * $min) / ($num - $i); //当前允许红包金额的最大值
if ($safe_total < 0) { //如果红金金额的最大值小于0就跳出循环
break;
}
$money = @mt_rand($min * 100, $safe_total * 100) / 100; //随机产生一个红包金额, mt_rand(min,max)是生成min到max的随机整数,包含min和max,所以为了生成的红包金额有小数,所以先*100,再/100
$total = $total - $money; //剩余红包总额
$wamp[$i] = round($money, 2); //保留两位有效数字
}
$wamp[$i] = round($total, 2); //最后一个红包金额
$returnData['MoneySum'] = $wamp;
$returnData['“运气王”'] = max($wamp);
$returnData[' 红包总额 '] = array_sum($wamp);//array_sum计算数组值的和
$max=max($returnData);
return $returnData;
}
//测试
echo '<pre>';
$data = getRedGift(100, 5);
print_r($data);
?>
效果图:
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