与其他索引值的单个多维数组检查php [英] single multidimensional array check with other index values php

问题描述

这是我的数组，我想检查一个索引值以保持其他索引值，如果product_id值相同，则求和total_qty.我处于这种情况.我需要帮助.谢谢您.

This is my array i want to check one index value to remain other index value and if product_id value same then sum of total_qty. i am stuck in this situation.i need help.Thank you in advance.

Array
(
    [0] => Array
        (
            [iProduct_id] => 1
            [fTotal_qty] => 200
        )

    [1] => Array
        (
            [iProduct_id] => 2
            [fTotal_qty] => 400
        )

    [2] => Array
        (
            [iProduct_id] => 6
            [fTotal_qty] => 500
        )

    [3] => Array
        (
            [iProduct_id] => 4
            [fTotal_qty] => 300
        )

    [4] => Array
        (
            [iProduct_id] => 5
            [fTotal_qty] => 200
        )

    [5] => Array
        (
            [iProduct_id] => 6
            [fTotal_qty] => 200
        )

    [6] => Array
        (
            [iProduct_id] => 1
            [fTotal_qty] => 300
        )

)

我想要这样的输出

product_id = 1
total_qty = 500

product_id = 2
total_qty = 400

product_id = 6
total_qty = 700

product_id = 4
total_qty = 300

product_id = 5
total_qty = 200

推荐答案

您可以使用简单的for-loop

$arr = array(array("id" => "1", "amount" => 200), array("id" => "2", "amount" => 400), array("id" => "1", "amount" => 100), array("id" => "2", "amount" => 600));

$res = array();
foreach($arr as $elem) {
    if (!isset($res[$elem["id"]])) //if this is the first time for this ID
        $res[$elem["id"]] = 0;
   $res[$elem["id"]] += $elem["amount"]; // add current amount
}

现在res包含(键是product_id，值是total_qty):

Now res contains (key is the product_id and the value is the total_qty):

Array
(
    [1] => 300
    [2] => 1000
)

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