SplDoublyLinkedList::push

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

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

Description

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

Pushes value at the end of the doubly linked list.

Parameters

value: The value to push.

Return Values

No value is returned.

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User Contributed Notes 3 notes

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Gilles A ¶

10 years ago

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)

down

chicotec dot asm at gmail dot com ¶

5 years ago

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);

down

lincoln dot du dot j at gmail dot com ¶

7 years ago

$spl = new SplDoublyLinkedList;

$spl->push(1);
$spl->push(2);
$spl->push(3);
$spl->push(8);
$spl->push(5);

print_r($spl);

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