In this article, you will learn how to count the array elements in PHP. The sizeof() function returns the number of elements in an array.

Note: This function is an alias of count() function.

What is the syntax of the sizeof() function in PHP?

sizeof(array, mode)

Parameter	Description
array	The array to count element of – Required
mode	Can be either 0 or 1. When set to 0 – Does not count elements of any subarray (multidimensional array). When set to 1 – Count the subarray elements (multidimensional array) or count recursively.

Examples of sizeof() function

Example 1. Count the number of elements in an array.

<?php
$bikes=array("Suzuki","Honda","Yamaha");
echo sizeof($bikes);
?>

Example 2. Count the number of elements of the multidimensional array (recursively).

<?php
$bikes=array
  (
  "Suzuki"=>array
  (
  "CD150",
  "CD210"
  ),
  "Honda"=>array
  (
  "CD70",
  "125"
  ),
  "Yamaha"=>array
  (
  "YBR"
  )
  );

echo "count: " . sizeof($bikes)";
echo "count recursively: " . sizeof($bikes,1);
?>