php教程 yii2怎么用uploadify

下载Uploadify控件可以到git网站上找，找到自己适合用的.例如我们下面用个就是从

https://github.com/xjflyttp/yii2-uploadify-widget 下载的，里面也有详细的操作文档。 （推荐学习：yii教程）

① 配置composer.json (就存在网站根目录下)，找到require，然后添加我们的uploadify

"require": {
"php": ">=5.4.0",
"yiisoft/yii2": ">=2.0.6",
"yiisoft/yii2-bootstrap": "*",
"yiisoft/yii2-swiftmailer": "*",
"xj/yii2-uploadify-widget": "~2.0.0" //这里是新添加的
},

② 利用composer 将yii2-uploadify-widget 下载到我们网站, 打开在网站根目录运行命令行 ,等待下载如图：

③ 视图的处理

<?php
use yii\web\JsExpression;
//外部TAG
echo Html::fileInput('test', NULL, ['id' => 'test']);
echo Uploadify::widget([
    'url' => yii\helpers\Url::to(['s-upload']),
    'id' => 'test', //需要跟上fileInput 的id 对应
    'csrf' => true,
    'renderTag' => false,
     'jsOptions' => [
                  'width' => 100,
                  'height' => 40,
                  'onUploadError' => new JsExpression(<<<EOF
                  function(file, errorCode, errorMsg, errorString) {
                        console.log('The file ' + file.name + ' could not be uploaded: ' + errorString + errorCode + errorMsg);
                    }
EOF
                    ),
                    'onUploadSuccess' => new JsExpression(<<<EOF
                    function(file, data, response) {
                        data = JSON.parse(data);
                        if (data.error) {
                            console.log(data.msg);
                             } else {
                                //在此处理你的图片
                               console.log(data.fileUrl);
                        }
                    }
EOF

④ 配置Controller 层

<?php
namespace \backend\controllers;
use xj\uploadify\UploadAction;
class TestController extends \yii\web\Controller
{
   public function actions() {
    return [
        's-upload' => [
            'class' => UploadAction::className(),
            //磁盘目录
            'basePath' => '@webroot/upload',
            //访问目录
            'baseUrl' => '@web/upload',
            //防止跨站攻击
            'enableCsrf' => true, // default
            'postFieldName' => 'Filedata', // default
            //BEGIN METHOD
            'format' => [$this, 'methodName'],
            //END METHOD
            //BEGIN CLOSURE BY-HASH
            //是否覆盖相同文件
            'overwriteIfExist' => true,
            //创建图片名称
            'format' => function (UploadAction $action) {
                $fileext = $action->uploadfile->getExtension();
                $filename = sha1_file($action->uploadfile->tempName);
                return "{$filename}.{$fileext}";
            },
             //想要多调用这个函数
            'format' => function (UploadAction $action) {
                $fileext = $action->uploadfile->getExtension();
                $filehash = sha1(uniqid() . time());
                $p1 = substr($filehash, 0, 2);
                $p2 = substr($filehash, 2, 2);
                return "{$p1}/{$p2}/{$filehash}.{$fileext}";
            },
            */
            'validateOptions' => [
                'extensions' => ['jpg', 'png'], //后缀验证
                'maxSize' => 1 * 1024 * 1024, //上传大小限制
             ],
             //验证前处理
            'beforeValidate' => function (UploadAction $action) {
                //throw new Exception('test error');
                },
             //验证后处理
            'afterValidate' => function (UploadAction $action) {},
             //保存前处理
            'beforeSave' => function (UploadAction $action) {},
            //保存后处理
            'afterSave' => function (UploadAction $action) {
                //$action->output 返回给浏览器的数据
                //返回Url 图片返回的路径
                //$action->getWebUrl()
                //图片的名称
                //$action->getFilename();
                //保存图片的物理位置
                //$action->getSavePath();
                //输出                                 
                //$action->output['fileUrl'] = $action->getWebUrl();
                //$action->output['fileName'] = $action->getFilename();
                //$action->output['filePath'] = $action->getSavePath();
                //$action->getFilename(); // "image/yyyymmddtimerand.jpg"
                //$action->getWebUrl(); //  "baseUrl + filename, /upload/image/yyyymmddtimerand.jpg"
                 //$action->getSavePath(); // "/var/www/htdocs/upload/image/yyyymmddtimerand.jpg"
                $action->output[‘fileUrl’] = $action->getWebUrl()
              },
           ],
        ];
     }
   }
?>

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