PHP 7.2.0 Beta 1 Released

SplDoublyLinkedList::isEmpty

(PHP 5 >= 5.3.0, PHP 7)

SplDoublyLinkedList::isEmptyChecks whether the doubly linked list is empty.

Description

public bool SplDoublyLinkedList::isEmpty ( void )

Parameters

This function has no parameters.

Return Values

Returns whether the doubly linked list is empty.

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User Contributed Notes 1 note

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lincoln dot du dot j at gmail dot com
16 days 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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