PHP SplPriorityQueue next() Function
Last Updated :
22 Apr, 2021
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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
// 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
$obj->next();
}
?>
<?php// Declare a classclass priorityQueue extends SplPriorityQueue { // Compare function to compare priority // queue elements public function compare($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 elementswhile($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
