Ds\Queue::peek
Ds\Queue::peek
(PECL ds >= 1.0.0)
Ds\Queue::peek — Returns the value at the front of the queue.
Description
public mixed Ds\Queue::peek ( void )
Returns the value at the front of the queue, but does not remove it.
Parameters
This function has no parameters.
Return Values
The value at the front of the queue.
Errors/Exceptions
UnderflowException if empty.
Examples
Example #1 Ds\Queue::peek() example
<?php
$queue = new \Ds\Queue();
$queue->push("a");
$queue->push("b");
$queue->push("c");
var_dump($queue->peek());
?> The above example will output something similar to:
string(1) "a"
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https://secure.php.net/manual/en/ds-queue.peek.php
