The SplHeap::insert() function is an inbuilt function in PHP which is used to insert an element in the heap by sifting it up.
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.
Syntax:
void SplHeap::insert( mixed $value )
Parameters: This function accept one parameter i.e. $value that is to be insert into the heap.
Return Value: This function does not return any value.
Below programs illustrate the SplHeap::insert() function in PHP:
Example 1:
PHP
<?php   // Create a new empty Min Heap $heap = new SplMinHeap();   // Inset elements in min heap $heap->insert('System'); $heap->insert('GFG'); $heap->insert('ALGO'); $heap->insert('C'); $heap->insert('Geeks'); $heap->insert('neveropen');   // Loop to display the max heap elements for ($heap->top(); $heap->valid(); $heap->next()) {     echo $heap->current() . "\n"; }   ?> |
Output:
ALGO C GFG Geeks neveropen System
Example 2:
PHP
<?php   // Create a new empty Max Heap $heap = new SplMaxHeap();   // Insert elements in max heap $heap->insert('System'); $heap->insert('GFG'); $heap->insert('ALGO'); $heap->insert('C'); $heap->insert('Geeks'); $heap->insert('neveropen');   // Loop to display the min heap elements for ($heap->top(); $heap->valid(); $heap->next()) {     echo $heap->current() . "\n"; }   ?> |
Output:
System neveropen Geeks GFG C ALGO
