php - 计算第一个数组中的键总数

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
        )
)

结果来自:

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

如何求和每个数组的键总数？

数组 = 5

数组 = 6

Answer 1

你可以做递归 count ，通过提供选项 COUNT_RECURSIVE。用简单的计数减去递归计数就可以得到你想要的

<?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

?>