Auto-detecting if a file is zip, tar.gz, gz etc then opening

Okay, so here's a strange one.

A client's text feed is inside a zip file, another is unzipped and another is .tar.gz encoded.

I can simply open a file using

fopen()

or, if it's an xml file, by calling

simple_xml_loadfile()

But simple XML won't open a zipped file, neither will fopen (if it is a text csv file).

So how can i autodetect what compression is being used?

Q. Does that file have a .gz or .zip extension? - A. No, they are dynamically generated files.

Any ideas anyone?

you can find a files extensions with substr($file, strpos($file,'.'), strlen($file)-1) ?

If you use [man]gzopen[/man] to open the file and [man]gzread[/man] it shouldn't matter if the file was compressed or not.

What about if it's a XML file and I'm opening it with 'simpleXML' or 'XMLreader'?

What about if it's a XML file and I'm opening it with 'simpleXML' or 'XMLreader'?

Is there some kind of stream wrapper that could be used to open it?

I am trying to write a class that supports both xml and csv...

iceomnia wrote:
Is there some kind of stream wrapper that could be used to open it?

You could always write one....

I am trying to write a class that supports both xml and csv...

That sounds like two classes, with a common interface, and a function to picks the appropriate class when reading the file.

iceomnia wrote:
Is there some kind of stream wrapper that could be used to open it?

You could always write one....

I am trying to write a class that supports both xml and csv...

That sounds like two classes, with a common interface, and a function to picks the appropriate class when reading the file.