关联数组总数值计数

检查数组print_r（）视图的波纹管。我想获得只有“金额”的总价值。并且输出不应该在数组中。它应该是一个简单的整数值。所以结果应该是4 + 3 + 9 = 16关联数组总数值计数

Array 
    (
     [0] => Array 
      (
       [id] => 15 
       [portfolio_id] => 1 
       [stock_id] => 1 
       [amount] => 4 
       [date] => 04/02/2017 
       [created_at] => 2017-04-02 09:04:30 
       [updated_at] => 2017-04-02 09:04:30 
      ) 

     [1] => Array 
      (
       [id] => 14 
       [portfolio_id] => 1 
       [stock_id] => 3 
       [amount] => 3 
       [date] => 04/02/2017 
       [created_at] => 2017-04-02 09:03:40 
       [updated_at] => 2017-04-02 09:03:40 
      ) 

     [2] => Array 
      (
       [id] => 13 
       [portfolio_id] => 1 
       [stock_id] => 4 
       [amount] => 9 
       [date] => 04/02/2017 
       [created_at] => 2017-04-02 09:03:36 
       [updated_at] => 2017-04-02 09:03:36 
      ) 

    )

来源

2017-04-02 Ryan Smith

尝试array_sum(array_column($input, 'amount'));

array_column将返回的amount键& array_sum值计算返回的数组

来源

2017-04-02 10:07:59

总是考虑添加现场演示链接：https：//eval.in/766287它使你的代码工作的其他明确。 – C2486

在值的总和尝试这一个：

function sum($carry, $item)// summing on amount column of the inner array $item 
{ 
    $carry += $item["amount"]; 
    return $carry; 
} 
echo "Amount sum : ".array_reduce($a, "sum");// output : 59

例如：

<?php 
/** 
* Created by PhpStorm. 
* User: lenovo 
* Date: 4/2/2017 
* Time: 11:17 AM 
*/ 

    $array = array 
    (
     array("name"=>"Volvo","amount"=>22,"id"=>18), 
     array("name"=>"BMW","amount"=>15,"id"=>13), 
     array("name"=>"Saab","amount"=>5,"id"=>2), 
     array("name"=>"Land Rover","amount"=>17,"id"=>15) 
    ); 

    function sum($carry, $item) 
    { 
     $carry += $item["amount"]; 
     return $carry; 
    } 
    echo "Amount sum : " .array_reduce($array, "sum");// output : 59

祝你好运。

来源

2017-04-02 10:13:59

关联数组总数值计数

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