SplPriorityQueue::count
(PHP 5 >= 5.3.0, PHP 7, PHP 8)
SplPriorityQueue::count — Counts the number of elements in the queue
说明
参数
此函数没有参数。
返回值
Returns the number of elements in the queue.
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xedin dot unknown at gmail dot com ¶
6 years ago
After iteration, the queue will be empty. Therefore, `count()` will return 0. You can circumvent this by iterating over a clone, instead of the actual queue.
https://stackoverflow.com/questions/27464012/splpriorityqueuenext-is-removing-the-item备份地址：http://www.lvesu.com/blog/php/splpriorityqueue.count.php