How to implement numerical sum in php

Methods to implement numerical sum: 1. When there are only two values, directly use the "value 1 value 2" statement to sum; 2. When there are multiple values, you can use "array(value 1, value 2, value 3...value n)" statement to store the value in the array, and use the "array_sum($arr)" statement to calculate the sum of all elements in the array.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

realize numerical values ​​in php Method of summing

When there are only two values, summing the values ​​is very simple. Just use the " " operator to add the two numbers:

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$a=2;
$b=3;
echo "数值1为：".$a;
echo "<br>数值2为：".$b;
echo "<br>两数相加求和：".($a+$b);
?>

If there are multiple values, you can also use the " " operator to add the numbers, but it is troublesome.

At this time, we can use the array

• to store the value in the array

• Use the array function array_sum() to calculate The sum of all elements in the array

<?php
header(&#39;content-type:text/html;charset=utf-8&#39;);   
$arr=array(1,2,3,4,5,6,7,8,9);
echo "多个数值：";
var_dump($arr);
echo "数值之和为：". array_sum($arr);
?>

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