After receiving the alarm, the server will push the message to the front desk (through the effect of front-end real-time message prompt-websocket long polling). After receiving the message, the front desk needs to issue an alarm sound to remind the user.
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn