[PHP] CURL文件上传

Posted 2022-09-21 reader

一、说明

　　本文主要简述CURL进行文件上传的一般操作，基于TP5框架；

　　

二、前端

　　代码如下，需要填入对应的上传地址还有修改接收的参数名字(这里是 file)：

 <form  action="上传地址"  method="post" enctype="multipart/form-data">
        <input type="file" name="file"> 
        <button type="submit">上传</button>
    </form>

 

 

三、后端

　　下面是基于TP5的上传处理，通过CURL上传到另外一台服务器上。

 1 <?php
 2 namespace app\controller;
 3 
 4 use think\Controller;
 5 
 6 //文件上传类
 7 class Upload extends Controller
 8 
 9     protected $file_size = 20971520;//20M
10     protected $file_type = ["png", "jpg", "jpeg", "gif"];
11     protected $ret = [‘code‘=>0, ‘msg‘=>‘‘, ‘data‘=>[]];
12     private $uploadUrl = "http://xxx.com";//上传地址
13 
14     public function doit()
15     
16         try
17             $verify = $file->validate([‘size‘=>$this->file_size,‘ext‘=>$this->file_type]);
18             if (!$verify) 
19                 throw new \Exception(‘上传的文件大小超过20M, 或文件类型不正确‘);
20             
21 
22             $ext = pathinfo($file->getInfo(‘name‘))[‘extension‘];
23             $tm = time();
24             $mime = $file->getInfo(‘type‘);
25 
26             //表单请求参数
27             $postData = [
28                 ‘file‘ => new \CURLFile(realpath($file->getPathname()), $mime, $fileName.".$ext"),
29             ];
30 
31             $curlRes = $this->curlUploadFile($this->uploadUrl, $postData);
32             $res = json_decode($curlRes, true);
33 
34             if($res[‘code‘] == 200 && $res[‘data‘][‘filePath‘] != "")
35                 $this->ret[‘code‘] = 200;
36                 $this->ret[‘msg‘] = ‘文件上传成功‘;
37                 $this->ret[‘data‘] = [‘filePath‘ => $res[‘data‘][‘filePath‘]];
38             else
39                 throw new \Exception(‘上传文件失败: ‘.$res[‘msg‘], 500);
40             
41         catch(\Exception $ex)
42             //异常处理
43             $this->ret[‘code‘] = 500;
44             $this->ret[‘msg‘] = $ex->getMessage();
45         
46         return json($this->ret);//返回json
47     
48
50 
51     //CURL文件上传
52     private function curlUploadFile($url, $data)
53     
54         $curl = curl_init();
55         if (class_exists(‘\CURLFile‘)) 
56             curl_setopt($curl, CURLOPT_SAFE_UPLOAD, true);
57             //$data = array(‘file‘ => new \CURLFile(realpath($path)));//>=5.5
58          else 
59             if (defined(‘CURLOPT_SAFE_UPLOAD‘)) 
60                 curl_setopt($curl, CURLOPT_SAFE_UPLOAD, false);
61             
62             //$data = array(‘file‘ => ‘@‘ . realpath($path));//<=5.5
63         
64         curl_setopt($curl, CURLOPT_URL, $url);
65         curl_setopt($curl, CURLOPT_POST, 1 );
66         curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
67         curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
68         $result = curl_exec($curl);
69         $error = curl_error($curl);
70 
71         curl_close($curl);
72 
73         return $result;
74     
75