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PHP | SplHeap current() Function

Last Updated : 28 Jun, 2019
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The SplHeap::current() function is an inbuilt function in PHP which is used to get the current element pointed by the iterator. Generally, the Heap Data Structure are 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:
mixed SplMaxHeap::current()
Parameters: This function does not accept any parameter. Return Value: This function returns current node of heap data structure. Below programs illustrate the SplMaxHeap::current() function in PHP: Program 1: php
<?php

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

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

// Move next node
$heap->next();
$heap->next();

echo $heap->current() . "\n";
?>
Output:
C
Program 2: php
<?php
 
// Create a new empty Max Heap
$heap = new SplMaxHeap();
 
$heap->insert('GEEKS');
$heap->insert('gfg');
$heap->insert('DSA');
$heap->insert('ALGO');
$heap->insert('C');

// Iterate array and print values
while($heap->valid()) {
     
    // Print current value of index of the array
    echo $heap->current(). "\n";
     
    // Move next each time of iteration
    $heap->next();
}

?>
Output:
gfg
GEEKS
DSA
C
ALGO
Reference: https://www.php.net/manual/en/splheap.current.php

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