PHP iterator_count() Function

The iterator_count() function is an inbuilt function in PHP that is used to count the number of elements in an iterator. An iterator is an object that is a collection of elements.

Syntax:

iterator_count(Traversable $iterator) : int

Parameters: This function accepts only one parameter which is described below.

• $iterator: The iterator for which you want to count the number of elements. This should be an object that implements the traversable interface, such as an array or an instance of a class that implements iterator or IteratorAggregate.

Return Value: The iterator_count() function returns the number of elements in the iterator if this function successfully executes.

Program 1: The following program demonstrates the iterator_count() function.

PHP

<?php

$numbers = [1, 2, 3, 4, 5];
$iterator = new ArrayIterator($numbers);
$numElements = iterator_count($iterator);
echo "Total elements in the iterator: $numElements";

?>

Output

Total elements in the iterator: 5

Program 2: The following program demonstrates the iterator_count() function.

PHP

<?php

// Sample string
$text = "GeeksforGeeks";
$iterator = new ArrayIterator(str_split($text));

// Count the total number of characters
// in the string
$numCharacters = iterator_count($iterator);
echo "Total number of characters in the string: $numCharacters";

?>

Output

Total number of characters in the string: 13

Reference: https://www.php.net/manual/en/function.iterator-count.php