使用PHP计算多维数组中的项目数

问题描述 投票:-1回答:2

假设我有这个数组:

Array
(
    [Europa] => Array
        (
            [country] => France
            [capital] => Paris
        ),
        (
            [country] => Spain
            [capital] => Madrid
        )
    [Asia] => Array
        (
            [country] => Russia
            [capital] => Moscow
        )
)

我如何计算包含在Asia或Europa`中的项目数量?

谢谢。

php arrays
2个回答
0
投票

假设

  $myArray= [
    'Europa' => [
            'country' => France
            'capital' => Paris
        ],
        [
            'country' => Spain
            'capital' => Madrid
        ],
    'Asia' => [
            'country' => Russia
            'capital' => Moscow
        ],
  ];

你可以使用基于索引的count()

$numEuropa = count($myArray['Europa']);
$numAsia = count($myArray['Asia']);

0
投票

count中使用array_map

$cnts = array_map("count", $array);

或者循环:

foreach($array as $key => $val)
    echo $key . " count is: " . count($value);

实例:3v4l

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