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SplDoublyLinkedList::isEmpty

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

SplDoublyLinkedList::isEmptyChecks whether the doubly linked list is empty

Description

public SplDoublyLinkedList::isEmpty(): bool

Parameters

This function has no parameters.

Return Values

Returns whether the doubly linked list is empty.

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lincoln dot du dot j at gmail dot com
6 years ago
//isEmpty is a method of SplDoublyLinkedList

$obj = new SplDoublyLinkedList();
// Check wither linked list is empty
if ($obj->isEmpty())
{
$obj->push(2);
$obj->unshift(10);
}
print_r($obj);

//Output like this
SplDoublyLinkedList Object
(
[flags:SplDoublyLinkedList:private] => 0
[dllist:SplDoublyLinkedList:private] => Array
(
[0] => 10
[1] => 2
)

)
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