php中gzip对文件或字符串解压缩的例子

2. /**
3. * php自定义gzdecode解压缩gzip文件
4. * edit bbs.it-home.org
5. */
6. if (!function_exists('gzdecode')) {
7. function gzdecode ($data) {
8. $flags = ord(substr($data, 3, 1));
9. $headerlen = 10;
10. $extralen = 0;
11. $filenamelen = 0;
12. if ($flags & 4) {
13. $extralen = unpack('v' ,substr($data, 10, 2));
14. $extralen = $extralen[1];
15. $headerlen += 2 + $extralen;
16. }
17. if ($flags & 8) // Filename
18. $headerlen = strpos($data, chr(0), $headerlen) + 1;
19. if ($flags & 16) // Comment
20. $headerlen = strpos($data, chr(0), $headerlen) + 1;
21. if ($flags & 2) // CRC at end of file
22. $headerlen += 2;
23. $unpacked = @gzinflate(substr($data, $headerlen));
24. if ($unpacked === FALSE)
25. $unpacked = $data;
26. return $unpacked;
27. }
28. }
29. ?>

调用：

2. $f=@file_get_contents(http://bbs.it-home.org);
3. echo gzdecode($f);
4. ?>