Laravel file upload operation

1. File upload

It is very simple to upload files in laravel. There is no need to introduce a third-party class library. The author treats the upload as a simple http request.
You can use use Illuminate\Http\Request;the filemethods or dynamic attributes provided by the instance to access the uploaded file, and filereturn one of the Illuminate\Http\UploadedFile;classes. Example, this class inherits from the class that provides methods for interacting with files in the PHP standard library SplFileInfo:

$file = $request -> file(‘photo’);
$file = $request -> photo;

You can use the hasFilemethod to determine whether the file exists in the request:

if ($request -> hasFile(‘photo’)) {
//
}

Verify whether the file is uploaded successfully.
Use the isValidmethod to determine whether there is an error in the upload process:

if ($request -> file(‘photo’) -> isValid()) {
//
}

For more methods, please visit:

http://api.symfony.com/3.0/Symfony/Component/HttpFoundation/File/UploadedFile.html

Ideas:
1. First judge whether the file is normal and existing
2. Obtain relevant information (optional)
3. Save the file (in fact, move the file to a new directory)

1.1 Modify the table structure, add the avatar field

Example:

Effect:

1.2 Create a form and route to add data

Add data form code:

1.3 Save path of uploaded file

Create a save path for the uploaded file (must be under the public file to ensure that the browser can access it.)

Controller code:

public function auto_verify(Request $request) {
    
    
        // 1、接收并验证数据是否符合规则
            $this -> validate($request, [
                // 此处是一个键值数组  "验证对字段名" => "规则1｜规则2｜规则3..."
                'name' => 'required|min:2|max:20|unique:member', // 姓名是必须对，最短2个字符，最长20个字符，在member表里名字是唯一的
                'age' => 'required|integer|min:1|max:200', // 必须的，整型，此处min和max表示最小为1，最大为200
                                                            //，因为我们这边定义了整型，laravel会自动判断min和max为数字
                'email' => 'required|email', // 验证邮箱
            ]);
        // 2、处理文件上传
            // 判断文件是否上传正常与存在
            if ($request -> hasFile('avatar') && $request -> file('avatar') -> isValid()) {
    
    
                // 对文件对重新命名
                $name = sha1(time().rand(100000,999999)). '.' .$request -> file('avatar') -> extension();
                dump($name);
                // 文件移动操作
                $request -> file('avatar') -> move('./statics/upload', $name);
                // 存文件地址
                $path = '/statics/upload/'.$name;
            }
        // 3、通过验证写入数据库
        $data = $request -> except(['_token', 'avatar']);
        $data['avatar'] = isset($path) ? $path : '';
        $result = Member::insert($data);
        
        // 4、告知用户操作是否成功
        return $result ? 'OK' : 'Failed';

    }

effect:

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