PHP使用CURL下传文件

$file = array("upimg"=>"@E:/png.png");//文件路径，前面要加@，表明是文件上传.$curl = curl_init("http://localhost/a.php");curl_setopt($curl,CURLOPT_POST,true);curl_setopt($curl,CURLOPT_POSTFIELDS,$file);curl_exec($curl);

$uploadFile = file_get_contents("E:/png.png");$boundary   = md5(time());$postStr .="--".$boundary."\r\n";//边界开始,注意默认比header定义的boundary多两个'-'$postStr .="Content-Disposition: form-data; name=\"upimg\"; filename=\"E:/png.png\"\r\n";$postStr .="Content-Type: image/png\r\n\r\n";$postStr .=$uploadFile."\r\n";$postStr .="--".$boundary."\r\n";//边界结束fwrite($fp,"POST /a.php HTTP/1.0\r\n");fwrite($fp,"Content-Type: multipart/form-data; boundary=".$boundary."\r\n");fwrite($fp,"Content-length:".strlen($postStr)."\r\n\r\n");fwrite($fp,$postStr);while (!feof($fp)){     echo fgets($fp, 128);}fclose($fp);print_r($_FILES);