2019独角兽企业重金招聘Python工程师标准>>> 
代码是基于ThinkPHP 3.2的，其他语言请自行实现，PHP版本为5.6
/**
* 图片上传
* @Author Qianlong <[email protected]>
* @PersonSite http://dev.21ds.cn/
*/
public function onlyUploadImage()
{
$upload = new \Think\Upload(); // 实例化上传类
$upload->maxSize = 3145728; // 设置附件上传大小
$upload->exts = array('jpg', 'bmp', 'png', 'jpeg'); // 设置附件上传类型
$upload->rootPath = './Uploads/'; // 设置附件上传根目录
$upload->savePath = ''; // 设置附件上传（子）目录
// 上传文件
$info = $upload->upload();
$access_token = $this->applet->getAccessToken();
$filename = '/webroot/Uploads/' . $info['file']['savepath'] . $info['file']['savename'];
$postd['access_token'] = $access_token;
$postd['type'] = 2;
$file['realpath'] = $filename;
$file['name'] = 'multipartFile';
$file['type'] = $info['file']['type'];
$status = $this->Https_request('https://openapi.baidu.com/file/2.0/smartapp/upload/image', $postd,null, $file);
if (!empty($status)) {
switch ($status['errno']) {
case '0':
$returnData['code'] = 200;
$returnData['data'] = $status['data'];
$returnData['msg'] = '上传成功';
$this->BspReturn($returnData);
break;
case '47003':
$returnData['code'] = -1;
$returnData['data'] = '';
$returnData['msg'] = '图片格式无效';
$this->BspReturn($returnData);
break;
case '47000':
$returnData['code'] = -1;
$returnData['data'] = '';
$returnData['msg'] = '图片格式无效';
$this->BspReturn($returnData);
break;
default:
$returnData['code'] = -1;
$returnData['data'] = $status;
$returnData['msg'] = '上传失败，请重试';
$this->BspReturn($returnData);
break;
}
} else {
$returnData['code'] = -1;
$returnData['data'] = $status;
$returnData['msg'] = '上传失败，请重试';
$this->BspReturn($returnData);
}
}
public function Https_request($url, $data = null, $cookie = null, $file = null, $header = '')
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt(
$curl,
CURLOPT_SSL_VERIFYPEER,
FALSE
);
curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, FALSE);
//携带cookie文件
if (!empty($cookie)) {
curl_setopt($curl, CURLOPT_COOKIEFILE, $cookie); //读取cookie
}
//携带头
if (!empty($header)) {
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
}
//上传文件
if (!empty($file)) {
$file_obj = new \CURLFile($file['realpath'], $file['type']);
$data["{$file['name']}"] = $file_obj;
}
//发送post数据
if (!empty($data) && !isset($file_obj)) {
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, http_build_query($data));
} elseif (!empty($data)) {
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
}
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$output = curl_exec($curl);
if (empty($output)) return 'no data';
curl_close($curl);
return is_null(json_decode($output)) ? $output : json_decode($output, true);
}文章来源：http://dev.21ds.cn/article/300.html