使用方法:    ------------Start of file---------- 
                 |< ? 
                 | include('gzipOut.php'); 
                 |? > 
                 |<HTML> 
                 |... the page ... 
                 |</HTML> 
                 |< ? 
                 | echo "............"
                 |
                 | doGzipout(); 
                 |? > 
                 -------------End of file-----------