PHP | Methods for getting the length of an array

First, get the length of a one-dimensional array

Count, sizeof can directly count the length of one-dimensional array.

For example: $arr = Array (' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 ');    echo count ($arr); Output 5
$arr = Array (' A ', ' B ', ' C ');   echo sizeof ($arr); Output 3

Second, get the length of the multidimensional array

The E.count function has two parameters:
0 (or Count_normal) is the default and does not detect multidimensional arrays (arrays in arrays);
1 (or count_recursive) for detecting multidimensional arrays;

　　

A. The length of the statistic two dimensions: count ($arr, 1);

B. The length of the two-dimensional array is not counted: count ($arr, 0);

PHP | Methods for getting the length of an array