PHP - Get the md5 of remote file?

Question

Is it possible to get the md5 of a file on a remote server? If so how?

Answer 1

how about md5_file("http://remotelocation/file")

Answer 2

It's not possible without downloading it, or the remote server providing the information (web service, HTML page, etc.)

You can use md5(file_get_contents("http://remotelocation/file")) to download the file and calculate the md5 hash if your PHP installation is configured to open remote streams. But that will download the complete file.