function QueueInterface::peek

Retrieves, but does not remove, the head of this queue, or returns `null` if this queue is empty.

Return value

T | null the head of this queue, or `null` if this queue is empty.

See also

self::element()

1 method overrides QueueInterface::peek()

Queue::peek in vendor/ramsey/collection/src/Queue.php

File

vendor/ramsey/collection/src/QueueInterface.php, line 172

Class

QueueInterface

A queue is a collection in which the entities in the collection are kept in order.

Namespace

Ramsey\Collection

Code

public function peek() : mixed;