PHP Manual: The SplStack class

Introduction

The SplStack class provides the main functionalities of a stack implemented using a doubly linked list by setting the iterator mode to SplDoublyLinkedList::IT_MODE_LIFO.

Class synopsis

SplStack

extends SplDoublyLinkedList

/* Inherited constants */

public const int SplDoublyLinkedList::IT_MODE_LIFO;

public const int SplDoublyLinkedList::IT_MODE_FIFO;

public const int SplDoublyLinkedList::IT_MODE_DELETE;

public const int SplDoublyLinkedList::IT_MODE_KEEP;

/* Inherited methods */

public void add(int $index, mixed $value)

public mixed bottom()

public int count()

public mixed current()

public int getIteratorMode()

public bool isEmpty()

public int key()

public void next()

public bool offsetExists(int $index)

public mixed offsetGet(int $index)

public void offsetSet(intnull $index, mixed $value)

public void offsetUnset(int $index)

public mixed pop()

public void prev()

public void push(mixed $value)

public void rewind()

public string serialize()

public int setIteratorMode(int $mode)

public mixed shift()

public mixed top()

public void unserialize(string $data)

public void unshift(mixed $value)

public bool valid()

Examples

Example #1 SplStack example

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

The above example will output:

3
2
1