PHP从网络下载文件

1. set_time_limit(0);
2. // Supports all file types
3. // URL Here:
4. $url = 'http://somsite.com/some_video.flv';
5. $pi = pathinfo($url);
6. $ext = $pi['extension'];
7. $name = $pi['filename'];
9. // create a new cURL resource
10. $ch = curl_init();
12. // set URL and other appropriate options
13. curl_setopt($ch, CURLOPT_URL, $url);
14. curl_setopt($ch, CURLOPT_HEADER, false);
15. curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
16. curl_setopt($ch, CURLOPT_AUTOREFERER, true);
17. curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
18. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
20. // grab URL and pass it to the browser
21. $opt = curl_exec($ch);
23. // close cURL resource, and free up system resources
24. curl_close($ch);
26. $saveFile = $name.'.'.$ext;
27. if(preg_match("/[^0-9a-z._-]/i", $saveFile))
28. $saveFile = md5(microtime(true)).'.'.$ext;
30. $handle = fopen($saveFile, 'wb');
31. fwrite($handle, $opt);
32. fclose($handle);

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PHP