PHP | SplHeap count() Function

The SplHeap::count() function is an inbuilt function in PHP which is used to count the elements in the heap.
Generally, Heap can be of two types:

• Max-Heap: In a Max-Heap the key present at the root node must be greatest among the keys present at all of its children. The same property must be recursively true for all sub-trees in that Binary Tree.
• Min-Heap: In a Min-Heap the key present at the root node must be minimum among the keys present at all of its children. The same property must be recursively true for all sub-trees in that Binary Tree.

Note: This article uses Max Heap which extends the SplHeap class.

Syntax:

int SplMaxHeap::count()

Parameters: This function does not accept any parameter.

Return Value: This function returns the number of nodes present in heap.

Below programs illustrate the SplMaxHeap::count() function in PHP:

Program 1:

<?php

// Create a new empty Max Heap
$heap = new SplMaxHeap();

$heap->insert('GEEKS');
$heap->insert('gfg');

// Print Result
echo $heap->count();

?>

Output:

2

Program 2:

<?php

// Create a new empty Max Heap
$heap = new SplMaxHeap();

// Print Result
echo $heap->count() . "\n";

$heap->insert('GEEKS');
$heap->insert('gfg');
$heap->insert('DSA');
$heap->insert('ALGO');
$heap->insert('C');

// Print Result
echo $heap->count();

?>

Output:

0
5

Reference: https://www.php.net/manual/en/splheap.count.php