<?php

$request = new HttpRequest();
$request->setUrl('http://pic.sogou.com/pic/upload_pic.jsp');
$request->setMethod(HTTP_METH_POST);

$request->setHeaders(array(
  'postman-token' => 'f586f153-4b94-f4f0-c6e9-b7183a3feb2b',
  'cache-control' => 'no-cache',
  'content-type' => 'multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW'
));

$request->setBody('------WebKitFormBoundary7MA4YWxkTrZu0gW
Content-Disposition: form-data; name="Content-Disposition: form-data; name="pic_path"; filename="下载.png"
Content-Type: image/png"; filename="下载.png"
Content-Type: image/png


------WebKitFormBoundary7MA4YWxkTrZu0gW--');

try {
  $response = $request->send();

  echo $response->getBody();
} catch (HttpException $ex) {
  echo $ex;
}

var form = new FormData();
form.append("Content-Disposition: form-data; name=\"pic_path\"; filename=\"下载.png\"\nContent-Type: image/png", "微信图片_20180619134812.jpg");

var settings = {
  "async": true,
  "crossDomain": true,
  "url": "http://pic.sogou.com/pic/upload_pic.jsp",
  "method": "POST",
  "headers": {
    "cache-control": "no-cache",
    "postman-token": "9974fe80-7e2e-21b3-6a90-cb90943f43a5"
  },
  "processData": false,
  "contentType": false,
  "mimeType": "multipart/form-data",
  "data": form
}

$.ajax(settings).done(function (response) {
  console.log(response);
});