Implementation example of tp uploading pictures and generating thumbnails function

The example of this article describes how thinkPHP implements the functions of uploading pictures and generating thumbnails. Share it with everyone for your reference, the details are as follows:

Record the method of uploading images (Upload) and generating thumbnails (Image) in thinkPHP.

In the html page form Must add enctype="multipart/form-data"

<form action="SELF" method="post" enctype="multipart/form-data">
 <table width="100%"class="cont">
   <tr>
   <td>照片：</td>
   <td width="20%"><input type="file" name="pic" id="pic" /></td>
   <td colspan="3"><input class="btn" type="submit" value="提交" /></td>
   <td> </td>
    </tr>
  </table>
</form>

php code

<?php
namespace Admin\Controller;
use Org\Util\Date;
use Think\Controller;
use Think\Image;
use Think\Upload;
class UserController extends Controller {
  public function add(){
    $user = M(&#39;user&#39;);
    if(!empty($_POST)){
      $user = $user->create();
      //判断传入的图片有没有问题
      if($_FILES[&#39;pic&#39;][&#39;error&#39;] == 0){
        $config = array(
          &#39;rootPath&#39;  => &#39;./Application/public/image/&#39; // 设置图片保存路径
        );
        //new一个上传模型
        $upload = new Upload($config);
        //上传图片
        $pic = $upload->uploadOne($_FILES[&#39;pic&#39;]);
        //将图片保存到数据库中
        $user[&#39;big_pic&#39;] = $pic[&#39;savepath&#39;].$pic[&#39;savename&#39;];
        //生成缩略图
        $img = new Image();
        //大图片的路径
        $big_img = $upload->rootPath.$user[&#39;big_pic&#39;];
        //打开大图片
        $img->open($big_img);
        //设置图片大小
        $img->thumb(200,300);
        //设置绝对路径
        $small_img = $upload->rootPath.$pic[&#39;savepath&#39;].&#39;small_&#39;.$pic[&#39;savename&#39;];
        //保存
        $img->save($small_img);
        //将图片名称存入数据库
        $user[&#39;img&#39;] = $pic[&#39;savepath&#39;].&#39;small_&#39;.$pic[&#39;savename&#39;];
      }
      $user[&#39;create_date&#39;] = date("Y-m-d H:i:s");
      $msg = "添加失败";
      if(M("user")->add($user))
        $msg = "添加成功";
      $this->redirect(show_list,null,3,$msg);
    }
    $this->display();
  }

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