PHP precise calculation function

This article mainly introduces the precise calculation function of PHP, and analyzes the precise method of PHP to perform mathematical operations such as addition, subtraction, multiplication and division in the form of examples, involving the use skills of bcadd, bcsub, bcmul, bcp and other functions. Friends who need it can Refer to the following

Introduction: Be sure to ensure the accuracy of the data. This is the basic quality of a good programmer.

<?php
/**
 * 精确加法
 * @param [type] $a [description]
 * @param [type] $b [description]
 */
function math_add($a,$b,$scale = &#39;2&#39;) {
  return bcadd($a,$b,$scale);
}
/**
 * 精确减法
 * @param [type] $a [description]
 * @param [type] $b [description]
 */
function math_sub($a,$b,$scale = &#39;2&#39;) {
  return bcsub($a,$b,$scale);
}
/**
 * 精确乘法
 * @param [type] $a [description]
 * @param [type] $b [description]
 */
function math_mul($a,$b,$scale = &#39;2&#39;) {
  return bcmul($a,$b,$scale);
}
/**
 * 精确除法
 * @param [type] $a [description]
 * @param [type] $b [description]
 */
function math_p($a,$b,$scale = &#39;2&#39;) {
  return bcp($a,$b,$scale);
}
/**
 * 精确求余/取模
 * @param [type] $a [description]
 * @param [type] $b [description]
 */
function math_mod($a,$b) {
  return bcmod($a,$b);
}
/**
 * 比较大小
 * @param [type] $a [description]
 * @param [type] $b [description]
 * 大于 返回 1 等于返回 0 小于返回 -1
 */
function math_comp($a,$b,$scale = &#39;5&#39;) {
  return bccomp($a,$b,$scale); // 比较到小数点位数
}
echo math_add(&#39;3.445&#39;,&#39;3.444&#39;)."\n"; // 加 6.88
echo math_sub(&#39;3.445&#39;,&#39;3.444&#39;)."\n"; // 减 0.00
echo math_mul(&#39;3.445&#39;,&#39;3.444&#39;)."\n"; // 乘 11.86
echo math_p(&#39;3.445&#39;,&#39;3.444&#39;)."\n"; // 除 1.00
echo math_mod(&#39;3.445&#39;,&#39;3.444&#39;)."\n"; // 取模 0
echo math_comp(&#39;3.445&#39;,&#39;3.444&#39;)."\n";// 比较 1
echo math_add(&#39;3.445&#39;,&#39;3.444&#39;,&#39;3&#39;)."\n"; // 加 6.889
echo math_sub(&#39;3.445&#39;,&#39;3.444&#39;,&#39;3&#39;)."\n"; // 减 0.001
echo math_mul(&#39;3.445&#39;,&#39;3.444&#39;,&#39;3&#39;)."\n"; // 乘 11.864
echo math_p(&#39;3.445&#39;,&#39;3.444&#39;,&#39;3&#39;)."\n"; // 除 1.000
echo math_mod(&#39;3.445&#39;,&#39;3.444&#39;)."\n"; // 取模 0
echo math_comp(&#39;3.445&#39;,&#39;3.444&#39;)."\n";// 比较 1
?>

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