YII2框架實現(xiàn)表單中上傳單個文件的方法示例

CREATE TABLE `tb_user` (
 `id` int(11) unsigned NOT NULL AUTO_INCREMENT COMMENT '用戶ID',
 `name` varchar(32) DEFAULT '' COMMENT '用戶名',
 `pwd` varchar(64) DEFAULT '' COMMENT '密碼',
 `head_img` varchar(256) DEFAULT '' COMMENT '圖像',
 `sex` tinyint(1) DEFAULT '0' COMMENT '性別(0:男,1:女)',
 `age` tinyint(3) DEFAULT '0' COMMENT '年齡',
 PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='用戶表';

?php
use yii\helpers\Url;
?>
!doctype html>
html lang="zh-CN">
head>
  meta charset="UTF-8">
  title>表單提交/title>
/head>
body>
form action="?php echo Url::toRoute('index/index'); ?>" method="post" enctype="multipart/form-data">
  姓名：input type="text" name="name">br>
  密碼：input type="password" name="pwd">br>
  性別：input type="radio" name="sex" value="0" checked>男
     input type="radio" name="sex" value="1">女br>
  年齡：input type="number" name="age">br>
  頭像：input type="file" name="head_img">br>
  input type="submit" value="提交">
  input name="_csrf" type="hidden" value="?php echo \Yii::$app->request->csrfToken; ?>">
/form>
/body>
/html>

?php

namespace app\models;

use yii\db\ActiveRecord;
use yii\web\UploadedFile;

class MyUser extends ActiveRecord
{
  //注意這里的上傳路徑是相對你入口文件
  const UPLOAD_PAHT = 'uploads/';

  //返回你要操作的數(shù)據(jù)表名
  public static function tableName()
  {
    return '{{%user}}';
  }

  //設(shè)置規(guī)則，驗證表單數(shù)據(jù)
  public function rules()
  {
    return [
      ['name', 'required', 'message' => '請?zhí)顚懹脩裘?],
      ['pwd', 'string', 'length' => [6, 12], 'message' => '密碼6-12位'],
      ['sex', 'in', 'range' => [0, 1], 'message' => '正確選擇性別'],
      ['age', 'integer', 'min' => 1, 'max' => 120, 'message' => '正確填寫年齡'],
      ['head_img', 'image', 'extensions' => ['png', 'jpg', 'gif'], 'maxSize' => 1024 * 1024 * 1024, 'message' => '請上傳頭像'],
    ];
  }

  //上傳頭像
  public function uploadHeadImg()
  {
    //'head_img'這個字符串必須跟你表單中file控件的name字段相同
    $head_img = UploadedFile::getInstanceByName('head_img');
    if (!empty($head_img)) {
      $filePath = self::UPLOAD_PAHT . date('Ymd') . '/';
      //判斷文件上傳路徑，如果不存在，則創(chuàng)建
      if (!file_exists($filePath)) {
        @mkdir($filePath, 0777, true);
        @chmod($filePath, 0777);
      }
      //文件名，我們通過md5文件名加上擴(kuò)展名
      $fileName = md5($head_img->baseName) . '.' . $head_img->extension;
      $file = $filePath . $fileName;
      //保存文件到我們的服務(wù)器上
      $head_img->saveAs($file);
      //返回服務(wù)器上的文件地址
      return $file;
    } else {
      return false;
    }
  }
}

?php

namespace app\controllers;

use YII;
use yii\web\Controller;

class IndexController extends Controller
{
  public function actionIndex()
  {
    if (YII::$app->request->isPost) {
      $user = new \app\models\MyUser();

      //把POST過來的數(shù)據(jù)加載到user對象
      $data = YII::$app->request->post();
      //注意第二個參數(shù)設(shè)為''，默認(rèn)YII的ActiveForm創(chuàng)建的表單元素會加上下標(biāo)
      $user->load($data, '');

      if ($user->validate()) {
        $user->pwd = YII::$app->security->generatePasswordHash($user->pwd);
        $user->head_img = $user->uploadHeadImg();

        //這里保存時設(shè)為false不驗證，因為pwd加密了
        $user->save(false);
      } else {
        var_dump($user->errors);
      }
    } else {
      return $this->renderPartial('index');
    }
  }
}