dongyuyi5680
2019-06-12 18:31
浏览 34
已采纳

PHP中多维数组的求和值

Supposing I have this array in PHP:

Array
(
    [0] => Array
        (
            [name] => Banana
            [quantity] => 124
        )
    [1] => Array
        (
            [name] => Cherry
            [quantity] => 24
        )
    [2] => Array
        (
            [name] => Apple
            [quantity] => 224
        )

)

How can I sum the number with the key quantity ?

Thanks.

图片转代码服务由CSDN问答提供 功能建议

假设我在PHP中有这个数组： 

  Array \  n（
 [0] =＆gt;数组
（
 [名称] =＆gt;香蕉
 [数量] =＆gt; 124 
）
 [1] =＆gt;数组
（
 [  name] =＆gt; Cherry 
 [数量] =＆gt; 24 
）
 [2] =＆gt;数组
（
 [名称] =＆gt; Apple 
 [数量] =＆gt; 224 
  ）
 
）
   
 
 
如何使用密钥 quantity 对数字求和？ 
 
 <  p>谢谢。
  • 写回答
  • 好问题 提建议
  • 关注问题
  • 收藏
  • 邀请回答

3条回答 默认 最新

  • doudiandi6967 2019-06-12 18:34
    已采纳

    Please, always share with us what you have tried.

    It help us a lot.

    You can use:

    $arr = [['name' => "Banana", 'quantity' => 124], ['name' => "Cherry", 'quantity' => 24], ['name' => "Apple", 'quantity' => 224]];

$sum = 0;
foreach ($arr as $item) {
    $sum += $item['quantity'];
}

    Or (PHP 5.5+):

    $sum = array_sum(array_column($arr, 'quantity'));
    已采纳该答案
    评论
    解决 无用
    打赏 举报
  • dongtazu3080 2019-06-12 18:40
    /*
    Receives a Multidemensional Array (Matrix) and returns the sum of quantity.
    Returns -1 on fail.
*/
function SumKeyOfArray($Matrix)
{
    if(!empty($Matrix))
    {
        $sum = 0;       
        foreach($Matrix as $array)
        {
            if(isset($array['quantity']))
                $sum = $sum + $array['quantity'];
        }
        return $sum;
    }
    return -1;
}
    评论
    解决 无用
    打赏 举报
  • duanben1324 2019-06-12 18:43

    Another option is to use the reduce function:

    $arr= [['name' => "Banana", 'quantity' => 124], ['name' => "Cherry", 'quantity' => 24], ['name' => "Apple", 'quantity' => 224]];

echo array_reduce($arr, function($sum, $elem) {
    return $sum += $elem["quantity"];
});
    评论
    解决 无用
    打赏 举报

报告相同问题？

提交

相关推荐 更多相似问题