如果我在 PHP 中有一个像这样的多维数组......
[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
)
我怎样才能将它们合并以产生......
[0] => Array
(
[url] => *can be anything*
[domain] => *can be anything*
[values] => Array
(
[character_length] => 55
[word_count] => 14
)
)
我认为没有任何内置函数可以让您对多维数组的值求和。不过,这里有一种使用 lambda 样式函数来实现此目的的方法。
假设这是您的数组:
[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
)
)
您可以创建一个可以将值传递给的函数:
$array_value_sum = create_function('$array,$key', '$total = 0; foreach($array as $row) $total = $total + $row[$key]; return $total;');
然后像这样使用它:
echo "Total Current Value" . $array_value_sum($obj['items'], 'current_value');
只需对所有项目执行简单的
foreach
并将值相加即可:
$values = array(
'character_length' => 0,
'word_count' => 0
);
foreach ($array as $item) {
$values['character_length'] += $item['values']['character_length'];
$values['word_count'] += $item['values']['word_count'];
}
您可以使用 array_sum() 和 array_map() 函数来完成此操作,如下所示:
$totalCharacterLength = array_sum(array_map(function($item) {
return $item['values']['character_length'];
}, $totalCharacterLength));
$totalWordCount = array_sum(array_map(function($item) {
return $item['values']['word_count'];
}, $totalWordCount));