php无刷新上传文件的代码

文件: upload.php

3. sleep(2);

4. $fileTypes = array('jpg','png','gif','bmp');

5. $result = null;
6. $uploadDir = './upfiles';
7. $maxSize = 1 * pow(2,20);

8. if ($_SERVER['REQUEST_METHOD'] == 'POST' && isset($_POST['sub'])) {

9. $myfile = $_FILES['myfile'];
10. $myfileType = substr($myfile['name'], strrpos($myfile['name'], ".") + 1);

11. if ($myfile['size'] > $maxSize) {

12. $result = 1;
13. } else if (!in_array($myfileType, $fileTypes)) {
14. $result = 2;
15. } elseif (is_uploaded_file($myfile['tmp_name'])) {
16. $toFile = $uploadDir . '/' . $myfile['name'];
17. if (@move_uploaded_file($myfile['tmp_name'], $toFile)) {
18. $result = 0;
19. } else {
20. $result = -1;
21. }
22. } else {
23. $result = 1;
24. }
25. }
26. ?>