随机数生成并在PHP中随机分为3个数字[重复]

Question

This question already has an answer here:

• How to make 5 random numbers with sum of 100 8 answers

Can a random number being generated and split/divided into let say 3 individual numbers randomly in PHP? (so they add up to the random number)

Basically I have a random number (range from 0 to 15)

For example:

There are 14 available now
- 2 in Gotham City
- 8 in Lakeview Hills
- 4 in Eskimoville

(just a dummy to give you the idea)

Isn´t there a simple approach to accomplish this?

Have a nice weekend!

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Answer 1

basic implementation would need error checking + not 100% random

<?php
//first initial number
// range must be 3-15 to get 3 random additions
$i = rand(3,15);
echo $i;
// generate what 3 number adds to $i
$one = rand(1,$i-2);
$i-=$one;
$two = rand(1,$i-1);
$i -= $two;
$three = rand(1,$i);
$i -= $three;
if($i > 0){
// add remained to third number
$three += $i;
}

echo $one;
echo $two;
echo $three;

?>