我正在使用这个媒体上传程序wp代码段，它可以将图像从我的一个站点下载到另一个站点。直到昨天它还可以正常工作，但今天早上我检查了一下，它不工作了。

            require_once(ABSPATH . \'wp-admin/includes/file.php\');
            require_once(ABSPATH . \'wp-admin/includes/media.php\');
            require_once(ABSPATH . \'wp-admin/includes/image.php\');

            $media_img_url = \'http://abc123.com/wp-content/2013/08/qwerty.jpg\';
            $tmp = download_url( $media_img_url );
            $post_id = 32454;
            $desc = \'The image is here\';

       echo $tmp;  //Output: /tmp/qwerty.tmp

// Set variables for storage
// fix file filename for query strings
preg_match(\'/[^\\?]+\\. (jpg|JPG|jpe|JPE|jpeg|JPEG|gif|GIF|png|PNG)/\', $media_img_url, $matches);              
$file_array[\'name\'] = basename($matches[0]);
$file_array[\'tmp_name\'] = $tmp;

print_r($matches); //Output: Array()
echo $file_array[\'name\'].                  //Output: Nothing
     \'<br>\'.$file_array[\'tmp_name\'];       //Output: /tmp/qwerty.tmp


            // If error storing temporarily, unlink
            if ( is_wp_error( $tmp ) ) {
                @unlink($file_array[\'tmp_name\']);
                $file_array[\'tmp_name\'] = \'\';
            }

            echo $file_array[\'name\'];        //Output: Nothing

            // do the validation and storage stuff
            $id = media_handle_sideload( $file_array, $post_id, $desc );

           print_r($id); //Output: WP_Error Object ( [errors] => Array ( [upload_error] => Array ( [0] => File is empty. Please upload something more substantial. This error could also be caused by uploads being disabled in your php.ini. ) ) [error_data] => Array ( ) ) 

            // If error storing permanently, unlink
            if ( is_wp_error($id) ) {
                @unlink($file_array[\'tmp_name\']);
                return $id;
            }

          print_r($id);                  //Output: Nothing

        $src = wp_get_attachment_url( $id );

          print_r($src);                  //Output: Nothing

出于调试目的，我在某些点回显了值，以了解它在哪里不起作用。我已经检查了php。多次使用ini文件，没有任何更改。以下是错误：

[Sun Sep 01 07:06:46 2013] [error] [client 213.236.00.15] (70014)End of file found: Error reading request entity data
[Sun Sep 01 07:11:09 2013] [error] [client 213.236.00.15] ModSecurity: Error reading request body: End of file found [hostname "abc123.com"] [uri "/wp-admin/admin-ajax.php"] [unique_id "UiNK-dBhnx0AAA3rD4cAAAAC"]

前端上传视频：从前端上载图像时出错：

[Sun Sep 01 22:54:18 2013] [error] [client 213.236.00.15] ModSecurity: Input filter: Failed writing 8192 bytes to temporary file (rc 18446744073709551615). [hostname "abc123.com"] [uri "/wp-admin/async-upload.php"] [unique_id "UiQoCdBhnx0AACtXBFwAAAAA"]
[Sun Sep 01 22:54:55 2013] [error] [client 213.236.00.15] ModSecurity: Multipart parsing error: Multipart: writing to "/tmp/20130901-225455-UiQoL9Bhnx0AACtYB4gAAAAD-file-pwzC5a" failed [hostname "abc123.com"] [uri "/wp-admin/async-upload.php"] [unique_id "UiQoL9Bhnx0AACtYB4gAAAAD"]

这两行在错误日志中以不同的计时冗余出现。

请任何人建议如何解决这个问题？谢谢