为您提供详细的答案，如果服务器端的请求处理存在任何问题

Giving you a detailed answer if there is any problem with request handling in server side there will be several problems

1. 服务器网络(您的代码没有任何问题，有时数据中心会遇到Internet连接问题.对数据中心的DDOS攻击也会对处理请求造成破坏)

1. Server Network ( You don't have any problem with you code , sometime some data center face internet connection problem . DDOS attacks on data center can also cause damage on processing request )

获取过多请求(每个Web服务器都有一些限制，因为服务器上无法处理过多请求.在低质量共享托管或低质量OpenCV托管中，您将面临此类问题.有点问题)

Getting too much request ( Every web server have some limitation because on server can not handle too much request . In Low quality shared hosting or Low quality OpenCV hosting you'll face this kind of problem . Even I faced this kind of a problem)

PHP配置错误，您的php可能配置不正确.也许那造成了所有的损害.打开php日志文件进行检查.配置修复后，请重新启动服务器.

PHP Configuration error , you'r php might not configured correctly . maybe that is causing all damage . Open the php log file to check there. after configuration fix PLEASE RESTART YOUR SERVER.