laravel5.5的上传图片（仅传到服务器端）

这里面包含单张和多张图片的上传
首先先来前端页面的html


<!DOCTYPE html>
<html>
<head>
    <title>上传图片</title>
</head>
<body>
<form method="post" action="{{url('uploadImgs')}}" enctype="multipart/form-data">
    {{csrf_field()}}
    <input type="file" name="filename[]"><br/>
    <input type="file" name="filename[]"><br/>
    <input type="file" name="filename[]">
    <button type="submit">上传图片</button>
</form>
</body>

记得路径那改成post
然后就是后台代码

到config/filesystem.php下增加一个

'upload' => [
            'driver' => 'local',
            'root' => 'uploadImages'
        ],

use Illuminate\Http\Request;

// 单张图片
 public function uploadImg(Request $request){
      if ($request->hasFile('filename')) {
            $postPics = $request->file('filename');
            foreach ($postPics as $k => $v) {
                $extension = $v->extension();
                $rule = ['jpg', 'png', 'gif', 'jpeg'];
                if (!in_array($extension, $rule)) {
                    return '图片格式需要为jpg,png,gif格式';
                }
                $dir = date('ymd');
                $fileName = time() . mt_rand(1, 999) . ".jpg";
                $storeResult = $v->storeAs('filename', $dir . "/" . $fileName, 'upload');// 默认保存位置是要到filesystem.php设置，保存到storage/app/..

                $outPut[] = [
                    'img_url' => "images/" . $storeResult, 'uid' => $uid, 'exam_id' => $examId, 'question_id' => $questionId,
                ];
            }

            DB::table('x2_upload_img')->insert($outPut);
            echo "写到数据库了，图片上去了只是ide加载很慢";

        } else {
            exit('未获得到上传文件，或上传失败');
        }

 // 多图上传
    public function uploadImgs(Request $request){
        if($request->hasFile('filename')){
            $postPics = $request->file('filename');
            foreach ($postPics as $k=>$v){
                $extension = $v->extension();
                $rule = ['jpg','png','gif','jpeg'];
                if(!in_array($extension,$rule)){
                    return '图片格式需要为jpg,png,gif格式';
                }
                $storeResult = $v->storeAs('filename','201810/test1.jpg','upload');// 默认保存位置是要到filesystem.php设置，保存到storage/app/..

                $outPut[] = [
                    'extension' => $extension,
                    'store_result' => $storeResult
                ];
            }
            echo "<pre>";
            print_r($outPut);die;
        }
        exit('未获得到上传文件，或上传失败');
    }

// 上传图片第二种方式(form表单直接传过来)
public uploadImg(){
        $image = $_FILES["photo"]["tmp_name"];
        $fp = fopen($image, "r");
        $file = fread($fp, $_FILES["photo"]["size"]); //二进制数据流
        //保存地址
        $imgDir = './Uploads/';
        //要生成的图片名字
        $filename = date("Ym")."/".md5(time().mt_rand(10, 99)).".png"; //新图片名称
        $newFilePath = $imgDir.$filename;
        $data = $file;
        $newFile = fopen($newFilePath, "w"); //打开文件准备写入
        fwrite($newFile, $data); //写入二进制流到文件
        fclose($newFile); //关闭文件
}