part 5 - Multiple File uploading | PHP Super Global Variables
By using this variables, we can get the uploaded file information like: file name, lifepath, size, type, temporary path, error code
BY default an HTML form can transfer, plain text data and html text only.
An HTML form can not transfer uploaded files to server by default
If we want to make a form to transfer the media data, we have to add an attribute enctype to the form
enctype="multipart/form-data"