The SplQueue class

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

Introduzione

The SplQueue class provides the main functionalities of a queue implemented using a doubly linked list by setting the iterator mode to SplDoublyLinkedList::IT_MODE_FIFO.

Sommario della classe

class SplQueue extends SplDoublyLinkedList {
/* Costanti ereditate */
/* Metodi */
public dequeue(): mixed
public enqueue(mixed $value): void
/* Metodi ereditati */
public SplDoublyLinkedList::add(int $index, mixed $value): void
}

Esempi

Example #1 SplQueue example

<?php
$q
= new SplQueue();
$q[] = 1;
$q[] = 2;
$q[] = 3;
foreach (
$q as $elem) {
echo
$elem."\n";
}
?>

Il precedente esempio visualizzerà:

1
2
3

Example #2 Efficiently handling tasks with SplQueue

<?php
$q
= new SplQueue();
$q->setIteratorMode(SplQueue::IT_MODE_DELETE);
// ... enqueue some tasks on the queue ...
// process them
foreach ($q as $task) {
// ... process $task ...
// add new tasks on the queue
$q[] = $newTask;
// ...
}
?>

Indice dei contenuti