<?php

//$bonus_total总数 $bonus_count个数 $bonus_type类型

function randBonus($bonus_total = 0,$bonus_count = 3,$bonus_type=1){

$bonus_items = array();//结果

$bonus_balance = $bonus_total;//余额

$bonus_avg = number_format($bonus_total/$bonus_count,2);//平均数

$i = 0;

while($i<$bonus_count){

if($i<$bonus_count-1){

$rand = $bonus_type?(rand(1,$bonus_balance*100-1)/100):$bonus_avg;

$bonus_items[] = $rand;

$bonus_balance -= $rand;

}else{

$bonus_items[] = $bonus_balance;

}

$i++;

}

return $bonus_items;

}

$bonus_items = randBonus(100,3,1);

var_dump($bonus_items);

var_dump(array_sum($bonus_items));

function sendRandBonus($total = 0,$count=3,$type=1){

//$total总数 $count个数 $type类型

if($type==1){

$input = range(0.01,$total,0.01);

if($count>1){

$rand_keys = (array)array_rand($input,$count-1);

$last = 0;

foreach($rand_keys as $i=>$key){

$current = $input[$key]-$last;

$items[] = $current;

$last = $input[$key];

}

}

$items[] = $total-array_sum($items);

}else{

$avg = number_format($total/$count,2);

$i = 0;

while($i<$count){

$items[] = $i<$count-1?$avg:($total-array_sum($items));$i++;

}

}

return $items;

}

$items = sendRandBonus(100,3,1);

var_dump($items);