PHP Array_Sum多维阵列上(PHP Array_Sum on multi dimensio

如果我在PHP中像这样一多维数组...

    [0] => Array
    (
        [url] => http://domain1.com
        [domain] => domain1.com
        [values] => Array
            (
                [character_length] => 25
                [word_count] => 7
            )

    )

    [1] => Array
    (
        [url] => http://domain2.com
        [domain] => domain2.com
        [values] => Array
            (
                [character_length] => 30
                [word_count] => 7

    )

我怎样才能把它们合并到生产....

    [0] => Array
    (
        [url] => *can be anything*
        [domain] => *can be anything*
        [values] => Array
            (
                [character_length] => 55
                [word_count] => 14
            )

    )

Answer 1:

只要做一个简单foreach的所有项目和求和的值：

$values = array(
    'character_length' => 0,
    'word_count'       => 0
);
foreach ($array as $item) {
    $values['character_length'] += $item['values']['character_length'];
    $values['word_count']       += $item['values']['word_count'];
}

Answer 2:

我不认为有任何内置的功能，它可以让你总结多维数组的值。 然而，这里的使用Lambda风格的功能做这件事的方式。

让我们假设这是你的数组：

 [items] => Array
        (
            [0] => Array
                (
                    [ID] => 11
                    [barcode] => 234334
                    [manufacturer] => Dell
                    [model] => D630
                    [serial] => 324233
                    [current_value] => 1100.00
                )

            [1] => Array
                (
                    [ID] => 22
                    [barcode] => 323552
                    [manufacturer] => Dell
                    [model] => D630
                    [serial] => 234322
                    [current_value] => 1500.00
                )

        )

你可以创建你能值传递给函数：

$array_value_sum = create_function('$array,$key', '$total = 0; foreach($array as $row) $total = $total + $row[$key]; return $total;');

然后用它像这样：

echo "Total Current Value" . $array_value_sum($obj['items'], 'current_value');

Answer 3:

为此，您可以使用array_sum（）和array_map（） funtion象下面这样：

$totalCharacterLength = array_sum(array_map(function($item) { 
    return $item['values']['character_length']; 
}, $totalCharacterLength));

$totalWordCount = array_sum(array_map(function($item) { 
    return $item['values']['word_count']; 
}, $totalWordCount));

文章来源: PHP Array_Sum on multi dimensional array