PHP 获取网页文件大小实例代码

2. $host="www.ite5e.com";
3. $fp = fsockopen("$host", 80, $errno, $errstr, 30);
4. if (!$fp) {
5. echo "$errstr ($errno)
   ";
6. } else {
7. $out = "GET / HTTP/1.1 ";
8. $out .= "Host: $host ";
9. $out .= "Connection: Close ";
10. }
12. fwrite($fp, $out);
13. $i=0;
14. while($i
15. {
16. $i ;
17. $con.=fread($fp,500);
18. }
19. //
20. echo $con;
21. //定义取出的字节数
22. preg_match("/Content-Length:.?(d )/", $con, $matches);
23. $size = $matches[1];
24. echo $size;
25. ?>