Several ways to get array lengths in PHP

How PHP Gets the length of the array, using the PHP function count (), or sizeof ()

For example:

The code is as follows	Copy Code
$arr = Array (' 0 ', ' 1 ', ' 2 ', ' 3 ', ' 4 '); echo count ($arr); Output 5 $arr = Array (' A ', ' B ', ' C '); echo sizeof ($arr); Output 3

sizeof () and count () have the same purpose, both functions can return the number of elements in an array. You can get the number of elements in a regular scalar quantity, if the array passed to the function is an empty array, or a variable that is not set, the number of elements returned is 0;

As with two function functions, the manual says that sizeof () is an alias for the function count ().

So how does the multidimensional array length count?

We can refer to: http://www.111cn.net/phper/21/32805.htm