Ds\Queue::peek
PHP function
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(PECL ds >= 1.0.0)
Returns the value at the front of the queue
Description
Ds\Queue::peek(): mixed
Returns the value at the front of the queue, but does not remove it.
Parameters Parameters
Return Values
The value at the front of the queue.
Errors/Exceptions
UnderflowException if empty.
Examples
Ds\Queue::peek() example
php
<?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:
output
string(1) "a"