Question

例如：

Array
(
[0] => Array
    (
        [id] => 1
        [name] => Test
        [slug] => test
        [services] => Array
            (
               [0] => Array
                   (
                       [name] => test
                   )
               [1] => Array
                   (
                       [name] => test
                   )
               [2] => Array
                   (
                       [name] => test
                   )
               [3] => Array
                   (
                       [name] => test
                   )
            )    
     )   
[1] => Array
    (
        [id] => 1
        [name] => Test
        [slug] => test
        [services] => Array
            (
               [0] => Array
                   (
                       [name] => test
                   )
               [1] => Array
                   (
                       [name] => test
                   )
               [2] => Array
                   (
                       [name] => test
                   )
               [3] => Array
                   (
                       [name] => test
                   )
            )    
     )

这只是虚拟数据，但是我想计算每个数组中的服务数量，但我正在寻找一种有效的方法。

现在我要这样做的方式是：

foreach($arrayAbove as $array){

    $i = 0;
    foreach($array['services'] as $array){
        $i++;
    }
}

有更好的方法吗？

Answer 1

 public void method(int a)
    {
        if (imgLine0 != null)
        {
            switch (a)
            {
                case 0:

                    imgLine0.Visibility = Visibility.Visible;

                    imgLine1.Visibility = Visibility.Collapsed;
                    imgLine2.Visibility = Visibility.Collapsed;
                    break;
                case 1:

                    imgLine0.Visibility = Visibility.Collapsed;

                    imgLine1.Visibility = Visibility.Visible;
                    imgLine2.Visibility = Visibility.Collapsed;
                    break;
                case 2:
                    imgLine0.Visibility = Visibility.Collapsed;

                    imgLine1.Visibility = Visibility.Collapsed;
                    imgLine2.Visibility = Visibility.Visible;
                    break;
            }
        }
    }

如果你想要整体计算：

foreach($arrayAbove as $array){

    $i = count($array['services']);
    print_r($i);
}

Answer 2

这是一种有趣的方式：

$result = array_reduce($array, function($c, $v) { return $c + count($v['services']); });

Answer 3

使用PHP sizeof() Function

foreach($arrayAbove as $array){

    $sub_array = sizeof($array['services']);           
    $total = $total + $sub_array;
}

echo 'Sub Array count is : '.$total;

如何在PHP中计算数组内的数组

3 个答案: