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" ; ?> |
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(); } ?> |
gfg GEEKS DSA C ALGO
Reference: https://www.php.net/manual/en/splheap.current.php