fopen — Opens file or URL
fopen ( string$filename , string$mode [, bool$use_include_path = FALSE [, resource$context ]] ) : resource
Parameters.
If filename is of the form “scheme://…”, it is assumed to be a URL and PHP will search for a protocol handler (also known as a wrapper) for that scheme. If no wrappers for that protocol are registered, PHP will emit a notice to help you track potential problems in your script and then continue as though specifies a regular file… PHP NET