apache_request_headers—获取全部 HTTP 请求头信息 arrayapache_request_headers (void) 获取当前请求的所有请求头信息 参数 ...

An example of a common request header sent to the server is If-Modified-Since. The server returns the file only if it has been changed since a certain date and time. See HTTP.

If you receive a 400 Bad Request, Request Header or Cookie Too Large or Big, nginx, message on Chrome, Edge, Firefox browser, then see how to fix it.

Pass parameters via request header in ASP.NET Core MVC The request header is yet another option for passing parameters to your action methods.