PHP 7.0.6 Released

    The SplStack class

    (PHP 5 >= 5.3.0, PHP 7)

    Introduction

    The SplStack class provides the main functionalities of a stack implemented using a doubly linked list.

    Class synopsis

    SplStack extends SplDoublyLinkedList implements Iterator , ArrayAccess , Countable {
    /* Methods */
    __construct ( void )
    void setIteratorMode ( int $mode )
    /* Inherited methods */
    public void SplDoublyLinkedList::add ( mixed $index , mixed $newval )
    public mixed SplDoublyLinkedList::bottom ( void )
    public int SplDoublyLinkedList::count ( void )
    public mixed SplDoublyLinkedList::current ( void )
    public int SplDoublyLinkedList::getIteratorMode ( void )
    public bool SplDoublyLinkedList::isEmpty ( void )
    public mixed SplDoublyLinkedList::key ( void )
    public void SplDoublyLinkedList::next ( void )
    public bool SplDoublyLinkedList::offsetExists ( mixed $index )
    public mixed SplDoublyLinkedList::offsetGet ( mixed $index )
    public void SplDoublyLinkedList::offsetSet ( mixed $index , mixed $newval )
    public void SplDoublyLinkedList::offsetUnset ( mixed $index )
    public mixed SplDoublyLinkedList::pop ( void )
    public void SplDoublyLinkedList::prev ( void )
    public void SplDoublyLinkedList::push ( mixed $value )
    public void SplDoublyLinkedList::rewind ( void )
    public string SplDoublyLinkedList::serialize ( void )
    public void SplDoublyLinkedList::setIteratorMode ( int $mode )
    public mixed SplDoublyLinkedList::shift ( void )
    public mixed SplDoublyLinkedList::top ( void )
    public void SplDoublyLinkedList::unserialize ( string $serialized )
    public void SplDoublyLinkedList::unshift ( mixed $value )
    public bool SplDoublyLinkedList::valid ( void )
    }

    Table of Contents

    User Contributed Notes

    lsroudi at gmail dot com
    2 years ago
    the SplStack is  simply a SplDoublyLinkedList with  an iteration mode IT_MODE_LIFO and IT_MODE_KEEP
    lsroudi at gmail dot com
    2 years ago
    <?php

    /**
    * Description of Stack
    *
    * (c) lsroudi <http://lsroudi.com/> <lsroudi@gmail.com>
    *
    * For the full copyright and license information, please view the LICENSE
    * file that was distributed with this source code.
    */
    class Stack {

        private     $splstack;

        function     __construct(\SplStack $splstack)
        {
                $this->splstack = $splstack;
        }

        public function     calculateSomme()
        {

            if (    $this->splstack->count() > 1){
                    $val1 = $this->splstack->pop();
                    $val2 = $this->splstack->pop();
                    $val = $val1 + $val2;
                    $this->splstack->push($val);
                    $this->calculateSomme();
            }
        }

            /**
         *
         * @return integer
         */
            public function displaySomme()
        {
                $result = $this->splstack->pop();
            return     $result;
        }

    }

    $splstack = new \SplStack();

    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);
    $splstack->push(10);

    $stack = new Stack($splstack);
    $stack->calculateSomme();
    die(    var_dump($stack->displaySomme())); // 150
    ?>
    source : https://github.com/lsroudi/OOPWithSPL/blob/master/Stack/Stack.php
    Sandro Alves Peres
    2 years ago
    <?php
    # Think of the stack as an array reversed, where the last element has index zero

    $stack = new SplStack();
    $stack->push('a');
    $stack->push('b');
    $stack->push('c');

    $stack->offsetSet(0, 'C'); # the last element has index zero

    $stack->rewind();

    while(     $stack->valid() )
    {
        echo     $stack->current(), PHP_EOL;
            $stack->next();
    }

    /*

    OUTPUT
    ****************************

    C
    b
    a

    */
    ?>
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