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   // 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    // 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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