The php function get_headers is a HEAD request or GET request.

The php function get_headers is a HEAD request or GET request.

$ Imageurl = 'http: // 127.0.0.1/1.png '; $ Headers = get_headers ($ imageurl ); In fact, the image is also a local image, but it is indeed "remote", the remote image can also be understood as a url image. Use the packet capture tool tcpdump to listen to the local port 80: Sudo tcpdump-I lo-nnA 'src port 80' Then access test. php. The key part of the captured package is as follows: the image content is also requested. Finally, get_headers is a GET request. to initiate a HEAD request, you can use fsockopen or curl. Download test code (including images): Test Code of the php function get_headers