(PHP 4 >= 4.1.0, PHP 5 >= 5.2.0, PECL zip >= 1.0.0)
zip_open — Open a ZIP file archive
$filename
   )Opens a new zip archive for reading.
filenameThe file name of the ZIP archive to open.
   Returns a resource handle for later use with
   zip_read() and zip_close()
   or returns the number of error if filename does not
   exist or in case of other error.