array_sum
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
array_sum — 对数组中所有值求和
说明
array_sum(array
$array): int|floatarray_sum() 将数组中的所有值相加，并返回结果。
参数
-
array -
输入的数组。
返回值
所有值的和以整数或浮点数的结果返回，array 为空时则返回 0。
范例
示例 #1 array_sum() 例子
<?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";
?>
以上例程会输出：
sum(a) = 20 sum(b) = 6.9
add a note
User Contributed Notes 4 notes
rodrigo at adboosters dot com ¶
4 months ago
If you want to calculate the sum in multi-dimensional arrays:
<?php
function array_multisum(array $arr): float {
$sum = array_sum($arr);
foreach($arr as $child) {
$sum += is_array($child) ? array_multisum($child) : 0;
}
return $sum;
}
?>
Example:
<?php
$data =
[
'a' => 5,
'b' =>
[
'c' => 7,
'd' => 3
],
'e' => 4,
'f' =>
[
'g' => 6,
'h' =>
[
'i' => 1,
'j' => 2
]
]
];
echo array_multisum($data);
//output: 28
?>
samiulmomin191139 at gmail dot com ¶
4 months ago
<?php
//you can also sum multidimentional arrays like this;
function arraymultisum(array $arr){
$sum=null;
foreach($arr as $child){
$sum+=is_array($child) ? arraymultisum($child):$child;
}
return $sum;
}
echo arraymultisum(array(1,4,5,[1,5,8,[4,5,7]]));
//Answer Will be
//40
?>
yakushabb at gmail dot com ¶
4 months ago
array_sum converts strings to integer and array_sum(2,'2') returns 4.
I had no idea.