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

// 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);

// Loop to print the priority
// queue elements
while($obj->valid()){

    // Print the current element
    echo $obj->current() . " ";

    // Move to next element of
    // priority queue
    $obj->next();
}

?>

Output

G G4G Geeks GFG 

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