Queue Handling Library : array « Data Structure « PHP






  1. PHP
  2. Data Structure
  3. array

Queue Handling Library

 
<?php
function &queue_initialize() {
    $new = array();
    return $new;
}

function queue_destroy(&$queue) {
    unset($queue);
}

function queue_enqueue(&$queue, $value) {
    $queue[] = $value;
}

function queue_dequeue(&$queue) {
    return array_shift($queue);
}

function queue_peek(&$queue) {
    return $queue[0];
}

function queue_size(&$queue) {
    return count($queue);
}

function queue_rotate(&$queue) {
    $queue[] = array_shift($queue);
}

$myqueue =& queue_initialize();
queue_enqueue($myqueue, 'Opal');
queue_enqueue($myqueue, 'Dolphin');
queue_enqueue($myqueue, 'Pelican');

echo '<p>Queue size is: ', queue_size($myqueue), '</p>';

echo '<p>Front of the queue is: ', queue_peek($myqueue), '</p>';

queue_rotate($myqueue);

echo '<p>Removed the element at the front of the queue: ', queue_dequeue($myqueue), '</p>';

queue_destroy($myqueue);
?>








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