This seems to be an oft-asked but never clearly answered question on the Web. I'm sending files to a PHP upload page using HTTP post from C++, and I also want to send the name of the directory I want the file stored in. I don't know where to put that directory-name string in the POST message, nor do I know how to retrieve it using PHP at the receiving end. The upload is working fine, but I admit I don't understand the syntax of the PHP page that's doing the receiving.
The POST request is pieced together line by line, as I found done in various examples. Like this:
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[body appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"userfile\"; filename=\"%s\"\r\n",
filename.c_str()] dataUsingEncoding:NSUTF8StringEncoding]];
Primarily I just need to get this working, but I also don't understand where all of the $_FILES info comes from at the PHP receiving end. For example, the POST snippet above clearly contains a value called "filename", but there is no reference to "filename" anywhere in the PHP upload page. Yet it works.
Any insight would be much appreciated!