Ds\Queue::peek
(PECL ds >= 1.0.0)
Ds\Queue::peek — Returns the value at the front of the queue
Descrierea
Returns the value at the front of the queue, but does not remove it.
Parametri
Această funcție nu are parametri.
Valorile întoarse
The value at the front of the queue.
Erori/Excepții
UnderflowException if empty.
Exemple
Example #1 Ds\Queue::peek() example
<?php
$queue = new \Ds\Queue();
$queue->push("a");
$queue->push("b");
$queue->push("c");
var_dump($queue->peek());
?>
Exemplul de mai sus va afișa ceva similar cu:
string(1) "a"
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