(PHP 5 >= 5.3.0, PHP 7, PHP 8)
The SplStack class provides the main functionalities of a stack implemented using a doubly linked list by setting the iterator mode toSplDoublyLinkedList::IT_MODE_LIFO.
Example #1SplStack example
<?php
$q= newSplStack();
$q[] =1;
$q[] =2;
$q[] =3;
foreach ($qas$elem) {
echo$elem."\n";
}
?>The above example will output:
321
the SplStack is simply a SplDoublyLinkedList with an iteration mode IT_MODE_LIFO and IT_MODE_KEEP<?php
//SplStack Mode is LIFO (Last In First Out)
$q= newSplStack();
$q[] =1;
$q[] =2;
$q[] =3;
$q->push(4);
$q->add(4,5);
$q->rewind();
while($q->valid()){
echo$q->current(),"\n";
$q->next();
}
?>
Output
5
4
3
2
1