php 求和两个数组的最佳方法
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15549045/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Best method for sum two arrays
提问by Philipp
I have two arrays:
我有两个数组：
$a = array(10, 2, 5, 10, 0);
$b = array(1, 20, 11, 8, 3);
I need to sum up and get the result:
我需要总结并得到结果：
$c = array(11, 22, 16, 18, 3);
Any suggestions on how do this without "foreach"?
关于如何在没有“foreach”的情况下做到这一点的任何建议？
回答by Philipp
a simple approach could be
一个简单的方法可能是
$c = array_map(function () {
return array_sum(func_get_args());
}, $a, $b);
print_r($c);
Or if you could use PHP5.6, you could also use variadic functions like this
或者如果你可以使用 PHP5.6，你也可以使用这样的可变参数函数
$c = array_map(function (...$arrays) {
return array_sum($arrays);
}, $a, $b);
print_r($c);
Output
输出
Array
(
[0] => 11
[1] => 22
[2] => 16
[3] => 18
[4] => 3
)
回答by Gautam3164
Try like
试试像
$c = array();
foreach (array_keys($a + $b) as $key) {
$c[$key] = $a[$key] + $b[$key];
}
回答by user1997620
There's no way you can do that without the "foreach" as you asked for, you need to loop on both arrays to get the respective values.
如果没有您要求的“foreach”，您就无法做到这一点，您需要在两个数组上循环以获取相应的值。
A function using the foreach would be :
使用 foreach 的函数是：
function sum_arrays($array1, $array2) {
$array = array();
foreach($array1 as $index => $value) {
$array[$index] = isset($array2[$index]) ? $array2[$index] + $value : $value;
}
return $array;
}
Now you just need to do :
现在你只需要做：
$c = sum_arrays($a, $b);
回答by Samuel Bolduc
$c = array();
for($i=0;$i<count($a);$i++) {
$c[$i] = $a[$i]+$b[$i];
}
