Reads to EOF on the given gz-file pointer from the current position and writes the (uncompressed) results to standard output.
You may need to call gzrewind() to reset the file pointer to the beginning of the file if you have already written data to it.
The gz-file pointer. It must be valid, and must point to a file successfully opened by gzopen().
The number of uncompressed characters read from gz
and passed through to the input, or
FALSE on error.
$fp = gzopen('file.gz', 'r');