37 lines
881 B
PHP
37 lines
881 B
PHP
<?php
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/**
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* File: queue.php
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* Created Time: 2024-05-19
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* Author: DoWake (admin@mengxing.cc)
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*/
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/* Driver Code */
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/* 初始化队列 */
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$queue = new SplQueue();
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/* 元素入队 */
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$queue->enqueue(1);
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$queue->enqueue(3);
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$queue->enqueue(2);
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$queue->enqueue(5);
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$queue->enqueue(4);
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echo '队列 queue = [' . join(', ', iterator_to_array($queue)) . ']' . PHP_EOL;
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/* 访问队首元素 */
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$peek = $queue->bottom();
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echo "队首元素 peek = {$peek}" . PHP_EOL;
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/* 元素出队 */
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$pop = $queue->dequeue();
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echo "出队元素 pop = {$pop}，出队后 queue = [" . join(', ', iterator_to_array($queue)) . ']' . PHP_EOL;
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/* 获取队列的长度 */
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$size = $queue->count();
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echo "队列长度 size = {$size}" . PHP_EOL;
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/* 判断队列是否为空 */
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$isEmpty = $queue->isEmpty();
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$isEmptyStr = $isEmpty ? 'true' : 'false';
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echo "队列是否为空 = {$isEmptyStr}" . PHP_EOL;
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