Question

Array
(
    [18] => Array
        (
            [0] => 137585189
            [1] => 138053588
        )

    [19] => Array
        (
            [0] => 137626141
            [1] => 137672213
            [2] => 137718802
        )
)

Array
(
    [18] => Array
        (
            [0] => 137585189
            [1] => 138053588
        )

    [19] => Array
        (
            [0] => 137626141
            [1] => 137672213
            [2] => 137718802
            [3] => 137732801
        )
)

这是以下结果：

foreach($value as $val){
  echo '<pre>';
  print_r($value);
  echo '</pre>';
        }

如何计算每个数组的键总数？

数组= 5

数组= 6

Answer 1

您可以通过提供选项COUNT_RECURSIVE来执行递归count。您可以通过简单计数

减去递归计数来得到您想要的结果

<?php
$food = array('fruits' => array('orange', 'banana', 'apple'),
              'veggie' => array('carrot', 'collard', 'pea'));

// recursive count
echo count($food, COUNT_RECURSIVE); // output 8

// normal count
echo count($food); // output 2

// to count second level entries
echo (count($food,COUNT_RECURSIVE)-count($food,0)); //output 6

?>

Answer 2

您可以像这样使用COUNT_RECURSIVE

count($arr, COUNT_RECURSIVE);

请注意，这包括内部数组本身，因此第一个数组最终为7。要解决此问题，您只需减去count($arr)

即可

Answer 3

试试这个：

<?php


$array = array(array(array(137585189,138053588),array(137626141,137672213,137718802)), array(array(137585189,138053588), array(137626141,137672213,137718802,137732801)));



foreach($array as $val){
    echo '<pre>';
    print_r($val);
    echo (count($val,COUNT_RECURSIVE)-count($val,0));

        }

?>

Demo Here>>

计算第一个数组中的键总数

3 个答案: