How a File can be Uploaded in PHP?

Question

I'm writing a PHP extension now in c/c++. User uploads a file (could be POST or PUT method, but I can limit it to POST only). I need to capture the file data while being uploaded, without writing it to disk on the server. I need to process the data and (maybe, depending on a situation) send it somewhere else or save it to disk.
Of course I know, that I can process the file after it has been uploaded (saved on disk on the server), but I would like to avoid it. I also need to do something opposite: I need to generate a file "on the fly" and send it
to the user. All metadata of the generated file is known beforehand (e.g. size, name).

I've been searching around for some time now and I could not find anything even close to the solution. Is there any example(s) or existing PHP extension that do(es) something like this (at least something simmilar) ? If you could give me any pointers that would be awesome.

Answer 1

For file upload in php type this code withing php tag.

move_uploaded_file ($_FILES['uploadFile'] ['tmp_name'],
"../uploads/{$_FILES['uploadFile'] ['name']}")

Answer 2

First create a html form for Uploading a file on the Server.

            <form action=" " method="post" enctype="multipart/form-data">

            Filename:<input type="file" name="userfile" /><br />

            <input type="submit" name="submit" value="Submit" />

           </form>

While Submitting a Form, $_FILES superglobal variable is created.

$_FILES['userfile']['name'] // The name of the Your file

$_FILES['userfile']['tmp_name'] // The path of the file in the temporary directory.

To upload file on the server ,use move_uploaded_file() function.

Syntax : move_uploaded_file(string sourcefilename,string destinationfilename);

It is mandatory to use ( enctype="multipart/form-data") attribute in form tag so as to upload the file.