PHP SplPriorityQueue isCorrupted() Function

PHP SplPriorityQueue key() Function

Last Updated : 22 Apr, 2021

The SplPriorityQueue::key() function is an inbuilt function in PHP that is used to return the current node index.

Syntax:

mixed SplPriorityQueue::key()

Parameters: This function does not accept any parameter. Return Value: This function returns the current node index.

Example:

PHP

<?php

// Declare a class
class priorityQueue extends SplPriorityQueue {
    
    // Compare function to compare priority
    // queue elements
    public function compare($p1, $p2) {
        if ($p1 === $p2) return 0;
        return $p1 < $p2 ? -1 : 1;
    }
}

// Create an object of priority queue
$obj = new priorityQueue();

// Insert elements into the queue
$obj->insert("Geeks",2);
$obj->insert("GFG",1);
$obj->insert("G4G",3);
$obj->insert('G',4);

// Use key() function to get the 
// current key of priority queue
var_dump($obj->key());

?>

Output

int(3)

Reference: https://www.php.net/manual/en/splpriorityqueue.key.php

PHP SplPriorityQueue isCorrupted() Function

A

ashokjaiswal

Improve

Article Tags :

Similar Reads

PHP SplPriorityQueue next() Function

The SplPriorityQueue::next() function is an inbuilt function in PHP that is used to extract the top node from the queue. Syntax: void SplPriorityQueue::next() Parameters: This function does not accept any parameter. Return Value: This function does not return any value. Example: PHP <?php // Decl

PHP SplPriorityQueue isEmpty() Function

The SplPriorityQueue::isEmpty() function is an inbuilt function in PHP that is used to check whether the queue is empty or not. Syntax: bool SplPriorityQueue::isEmpty() Parameters: This function does not accept any parameter. Return Value: This function returns a boolean value either true or false d

PHP SplPriorityQueue insert() Function

The SplPriorityQueue::insert() function is an inbuilt function in PHP which is used to inserts an element in the queue by sifting the elements. Insert elements in priority queue by given priority. Syntax: bool SplPriorityQueue::insert( mixed $value, mixed $priority ) Parameters: This function accept

PHP SplPriorityQueue count() Function

The SplPriorityQueue::count() function is an inbuilt function in PHP which is used to count the number of elements in the queue. Syntax: int SplPriorityQueue::count() Parameters: This function does not accept any parameters. Return Value: This function returns the number of elements in the queue. Ex

PHP SplPriorityQueue isCorrupted() Function

The SplPriorityQueue::isCorrupted() function is an inbuilt function in PHP that is used to tells the priority queue is in a corrupted state or not. Syntax: bool SplPriorityQueue::isCorrupted() Parameters: This function does not accept any parameter. Return Value: This function returns true if the pr

PHP SplPriorityQueue rewind() Function

The SplPriorityQueue::rewind() function is an inbuilt function in PHP which is used to rewind the iterator back to the start position. Syntax: void SplPriorityQueue::rewind() Parameters: This function does not accept any parameter. Return Value: This function does not return any value. Example: PHP

PHP SplPriorityQueue current() Function

The SplPriorityQueue::current() function is an inbuilt function in PHP which is used to return the current node pointed by the iterator. Syntax: mixed SplPriorityQueue::current() Parameters: This function does not accept any parameter. Return Value: This function returns the value/priority of the cu

PHP SplPriorityQueue extract() Function

The SplPriorityQueue::extract() function is an inbuilt function in PHP which is used to extract a node from top of the heap and sift up. Syntax: mixed SplPriorityQueue::extract() Parameters: This function does not accept any parameter. Return Value: This function returns the value/priority (or both)

PHP SplPriorityQueue compare() Function

The SplPriorityQueue::compare() function is an inbuilt function in PHP which is used to compare the priority queue elements to place at a particular order in the heap data structure. Syntax: int SplPriorityQueue::compare( mixed $priority1 , mixed $priority2 ) Parameters: This function accepts two pa

PHP SplHeap key() Function

The SplHeap::key() function is an inbuilt function in PHP which is used to get the current node index. 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