php 在foreach循环php中求和值

Sum values in foreach loop php

提问by bob

foreach($group as $key=>$value)
{
    echo $key. " = " .$value. "<br>";
}

For example:

例如：

doc1 = 8

doc2 = 7

doc3 = 1

文档 1 = 8

文档 2 = 7

文档 3 = 1

I want to count $value, so the result is 8+7+1 = 16. What should i do?

我想计算$value，所以结果是8+7+1 = 16。我该怎么办？

Thanks.

谢谢。

回答by chandresh_cool

$sum = 0;
foreach($group as $key=>$value)
{
   $sum+= $value;
}
echo $sum;

回答by Kishan Patel

In your case IF you want to go with foreach loop than

在您的情况下，如果您想使用 foreach 循环而不是

$sum = 0;
foreach($group as $key => $value) {
   $sum += $value; 
}
echo $sum;

But if you want to go with direct sum of array than look on below for your solution :

但是，如果您想使用数组的直接求和，请不要在下面查看您的解决方案：

$total = array_sum($group);

for only sum of arraylooping is time wasting.

因为只有数组循环的总和是浪费时间。

http://php.net/manual/en/function.array-sum.php

http://php.net/manual/en/function.array-sum.php

array_sum — Calculate the sum of values in an array

array_sum — 计算数组中值的总和

<?php
$a = array(2, 4, 6, 8);
echo "sum(a) = " . array_sum($a) . "\n";

$b = array("a" => 1.2, "b" => 2.3, "c" => 3.4);
echo "sum(b) = " . array_sum($b) . "\n";
?>

The above example will output:

上面的例子将输出：

sum(a) = 20
sum(b) = 6.9

回答by Mr. Alien

Use +=

用 +=

$val = 0;

foreach($arr as $var) {
   $val += $var; 
}

echo $val;

回答by Austin Brunkhorst

You can use array_sum().

您可以使用array_sum().

$total = array_sum($group);

回答by Suhel Meman

$total=0;
foreach($group as $key=>$value)
{
   echo $key. " = " .$value. "<br>"; 
   $total+= $value;
}
echo $total;