PHP切割整数工具类似微信红包金额分配的思路详解

网络编程 2024/11/18 佚名

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Composer地址：https://packagist.org/packages/werbenhu/php-number-slicing

GitHub地址：https://github.com/werbenhu/php-number-slicing

主要代码：NumberSlicing.php

思路：将数字按精度放大倍数，比如切割数字1，切割的份数是10，精度是0.01，则将1放大100 X 10倍，然后再来对加了1000倍权重后的值进行切割。切割完成之后，再将权重去除，保证总值是1。

<"htmlcode">

use Werben\Tools\NumberSlicing;
 
function testIntSlicing2IntOne() {
 $precision = 1; //精确度 eg: 1, 0.1, 0.01, 0.01
 $size = 10;   //切割的份数，the size of the number to slicing
 $min = 3;  //最小额度，最小额度必须大于最小精度，min amount eg: 3, 0.23, 0.05, 0.008
 $number = 100;  //要切割的数字，the number
 $items = NumberSlicing::numberSlicing($number, $size, $precision, $min);
 $sum = 0.0;
 $ret_min = $number;
 foreach ($items as $value) {
  $sum += $value;
  if ($ret_min > $value) {
   $ret_min = $value;
  }
 }
 $count = count($items);
 echo "count: $count, sum: $sum, ret_min: $ret_min\n";
 echo "items : ". json_encode($items) ."\n";
}
function testIntSlicing2IntTwo() {
 $precision = 1; //精确度 eg: 1, 0.1, 0.01, 0.01
 $size = 30;   //切割的份数，the size of the number to slicing
 $min = 18666;  //最小额度，最小额度必须大于最小精度，min amount eg: 3, 0.23, 0.05, 0.008
 $number = 800000;  //要切割的数字，the number
 $items = NumberSlicing::numberSlicing($number, $size, $precision, $min);
 $sum = 0.0;
 $ret_min = $number;
 foreach ($items as $value) {
  $sum += $value;
  if ($ret_min > $value) {
   $ret_min = $value;
  }
 }
 $count = count($items);
 echo "count: $count, sum: $sum, ret_min: $ret_min\n";
 echo "items : ". json_encode($items) ."\n";
}
function testIntSlicing2FloatOne() {
 $precision = 0.01; //精确度 eg: 1, 0.1, 0.01, 0.01
 $size = 1000;   //切割的份数，the size of the number to slicing
 $min = 0.05;  //最小额度，最小额度必须大于最小精度，min amount eg: 3, 0.23, 0.05, 0.008
 $number = 100;  //要切割的数字，the number
 $items = NumberSlicing::numberSlicing($number, $size, $precision, $min);
 $sum = 0.0;
 $ret_min = $number;
 foreach ($items as $key => $value) {
  $sum += $value;
  if ($ret_min > $value) {
   $ret_min = $value;
  }
 }
 $count = count($items);
 echo "count: $count, sum: $sum, ret_min: $ret_min\n";
 echo "items: ". json_encode($items) ."\n";
}
function testIntSlicing2FloatTwo() {
 $precision = 0.00001; //精确度 eg: 1, 0.1, 0.01, 0.01
 $size = 1000;   //切割的份数，the size of the number to slicing
 $min = 0.00005;  //最小额度，最小额度必须大于最小精度，min amount eg: 3, 0.23, 0.05, 0.008
 $number = 5;  //要切割的数字，the number
 $items = NumberSlicing::numberSlicing($number, $size, $precision, $min);
 $sum = 0.0;
 $ret_min = $number;
 foreach ($items as $key => $value) {
  $sum += $value;
  if ($ret_min > $value) {
   $ret_min = $value;
  }
 }
 $count = count($items);
 echo "count: $count, sum: $sum, ret_min: $ret_min\n";
 echo "items: ". json_encode($items) ."\n";
}


总结
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