thinkphp图片上传

// 配置文件中设置允许的文件类型和大小
'upload' => [
    'maxSize' => 3145728, // 3MB
    'exts' => ['jpg', 'jpeg', 'png', 'gif'],
],

// 上传文件并保存路径
$upload = new \Think\Upload();
$upload->maxSize = 3145728;
$upload->exts = ['jpg', 'jpeg', 'png', 'gif'];
$upload->savePath = './Uploads/';
$info = $upload->upload();
if (!$info) {
    echo $upload->getError();
} else {
    $file = $info['file']['savepath'] . $info['file']['savename'];
    echo '上传成功，文件路径：' . $file;
}

<?php
namespace Home\Controller;
use Think\Controller;

class UploadController extends Controller {
    public function upload() {
        $upload = new \Think\Upload();
        $upload->maxSize = 3145728; // 设置上传文件大小限制，单位字节
        $upload->exts = array('jpg', 'gif', 'png', 'jpeg'); // 设置允许上传的文件类型
        $upload->rootPath = './Uploads/'; // 设置上传根目录
        $upload->savePath = ''; // 设置上传子目录

        if (!$info = $upload->upload()) {
            $this->error($upload->getError());
        } else {
            $this->success('上传成功！', '', array('url' => '/index.php/Home/Index/index'));
        }
    }
}