SplDoublyLinkedList::push

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

SplDoublyLinkedList::push — Pushes an element at the end of the doubly linked list

说明

public SplDoublyLinkedList::push ( mixed $value ) : void

Pushes value at the end of the doubly linked list.

参数

value: The value to push.

返回值

没有返回值。

User Contributed Notes

chicotec dot asm at gmail dot com 14-Feb-2019 09:00


You can also push an element at the end of the doubly linked list like in a simple array with square brackets:



$spl = new SplDoublyLinkedList;



$spl[] = 1;

$spl[] = 2;

$spl[] = 3;

$spl[] = 4;



print_r($spl);

lincoln dot du dot j at gmail dot com 11-Jul-2017 05:35


$spl = new SplDoublyLinkedList;



$spl->push(1);

$spl->push(2);

$spl->push(3);

$spl->push(8);

$spl->push(5);



print_r($spl);

Gilles A 30-Sep-2014 02:18


Be careful SplStack mode is LIFO (Last In First Out) not FIFO (First in First Out) 

<?php

// Array (FIFO)

$stack = array();

array_push($stack,"orange");

array_push($stack,"banana");

array_push($stack,"apple");

array_push($stack,"raspberry");



var_dump($stack);

?>

// result



array (size=4)

  0 => string 'orange' (length=6)

  1 => string 'banana' (length=6)

  2 => string 'apple' (length=5)

  3 => string 'raspberry' (length=9)



<?php

// SplStack (LIFO)

$stack = new SplStack();

$stack ->push('orange');

$stack ->push('banana');

$stack ->push('apple');

$stack->push('raspberry');



$stack->rewind();

while($stack->valid()){

    var_dump($stack->current());

    $stack->next();

    

}

?>

//result 

string 'raspberry' (length=9)

string 'apple' (length=5)

string 'banana' (length=6)

string 'orange' (length=6)