本文讲解了plupload的相关代码，实现了ajax多图同时上传，然后将图片进行缩放，最后显示图片，分享给大家供大家参考，具体内容如下
1、文章视图中调用Plupload
<?= \common\widgets\Plupload::widget([ 'model'=>$model, 'attribute'=>'cover_img', 'url'=>'/file/upload',//处理文件上传控制器 ])?>
2、\common\widgets\Plupload 组件
<?php namespace common\widgets; use backend\assets\UploadAsset; use yii; use yii\helpers\Html; use yii\base\Exception; class Plupload extends yii\bootstrap\Widget{ public $model; public $attribute; public $name; public $url; private $_html; public function init(){ parent::init(); if(!$this->url){ throw new Exception('url参数不能为空'); } if(!$this->model){ throw new Exception('model属性不能为空'); } if(!$this->attribute){ throw new Exception('attribute属性不能为空'); } } public function run(){ $model = $this->model; $attribute = $this->attribute; $path = $model->$attribute?$model->$attribute:"/images/noimage.gif";//显示文章图片或者默认图片 $this->_html.='<div>'; $this->_html.=Html::activeLabel($model,$attribute); $this->_html.=Html::activeHiddenInput($model,$attribute,['id'=>'hidden_input','value'=>$path]); $this->_html .= '<div><img src="'https://www.jb51.net/article/.$path.'" /></div>'; $this->_html.='</div> '; UploadAsset::register($this->view); $this->view->registerJs( '$(function(){ initCoverImageUploader("pickfiles","container","2mb","'.$this->url.'","'.Yii::$app->request->getCsrfToken().'"); });' ); return $this->_html; } }
3、backend\assets\UploadAsset
注册相关js
<?php namespace backend\assets; use yii\web\AssetBundle; class UploadAsset extends AssetBundle { public $basePath = '@webroot'; public $baseUrl = '@web'; public $css = [ ]; public $js = [ 'js/upload.js' ]; public $depends = [ 'backend\assets\PluploadAsset', ]; }
4、js/upload.js
ajax处理代码
function initCoverImageUploader(buttonId,contatinerId,maxFileSize,url,csrfToken){ var uploader = new plupload.Uploader({ runtimes : 'html5,flash,silverlight,html4', browse_button :buttonId, // you can pass an id... container: contatinerId, // ... or DOM Element itself url : url, flash_swf_url : '@vendor/moxiecode/plupload/js/Moxie.swf', silverlight_xap_url : '@vendor/moxiecode/plupload//js/Moxie.xap', filters : { max_file_size : maxFileSize, mime_types: [ {title : "Image files", extensions : "jpg,gif,png"}, {title : "Zip files", extensions : "zip"} ] }, multipart_params:{ '_csrf':csrfToken }, init: { FilesAdded: function(up, files) { uploader.start(); }, UploadProgress: function(up, file) { $('#'+contatinerId+' p').text('已上传:'+file.percent+'%'); }, FileUploaded:function (up, file, result) { result = $.parseJSON(result.response); if(result.code == 0){ $('#'+buttonId).html('<img src="'https://www.jb51.net/+result.path+'" />'); $('#hidden_input').val(result.path); //console.log(result.message); } }, Error: function(up, err) { document.getElementById('console').appendChild(document.createTextNode("\nError #" + err.code + ": " + err.message)); } } }); uploader.init(); }
5、backend\assets\PluploadAsset
注册plupload相关资源
<?php namespace backend\assets; use yii\web\AssetBundle; class PluploadAsset extends AssetBundle { public $sourcePath = '@vendor/moxiecode/plupload'; public $css = [ ]; public $js = [ 'js/plupload.full.min.js', ]; public $depends = [ 'yii\web\JqueryAsset', ]; }
6、FileController
控制器调用模型处理上传文件，并且返回结果
class FileController extends BaseController { public function actionUpload(){ Yii::$app->response->format=Response::FORMAT_JSON; $model = New ImageUpload(); $model->fileInputName = 'file'; if($model->save()){ return ['code'=>0,'message'=>$model->getMessage(),'path'=>$model->getUrlPath()]; }else{ return ['code'=>1,'message'=>$model->getMessage()]; } } }
7、common\models\ImageUpload
模型中对上传文件做了一定的检测，然后将源文件按照一定的比例进行缩放
<?php namespace common\models; use yii\base\Exception; use yii\helpers\FileHelper; use yii\web\UploadedFile; class ImageUpload extends \yii\base\Object { public $fileInputName = 'file';//上传表单 file name public $savePath ;//图像保存根位置 public $allowExt = ['jpg','png','jpeg','gif','bmp'];//允许上传后缀 public $maxFileSize=1024100000;//最大大小 public $allowType = ['image/jpeg','image/bmp','image/gif','image/png','image/pjpeg','image/bmp','image/gif','image/x-png','image/pjpeg','image/bmp', 'image/gif' ,'image/x-png','image/pjpeg','image/bmp','image/gif','image/x-png']; private $_uploadFile;//上传文件 private $filePath;//文件路径 private $urlPath;//访问路径 private $res=false;//返回状态 private $message;//返回信息 public function getMessage(){ return $this->message; } public function getUrlPath(){ return $this->urlPath; } public function init(){ if(!$this->fileInputName) throw new Exception('fileInputName属性不能为空'); if(!$this->savePath) $this->savePath = \Yii::$app->basePath.'/web/uploads/images'; $this->savePath = rtrim($this->savePath,'https://www.jb51.net/'); if(!file_exists($this->savePath)){ if(! FileHelper::createDirectory($this->savePath)){ $this->message = '没有权限创建'.$this->savePath; return false; } } $this->_uploadFile = UploadedFile::getInstanceByName($this->fileInputName); if(!$this->_uploadFile){ $this->message = '没有找到上传文件'; return false; } if($this->_uploadFile->error){ $this->message = '上传失败'; return false; } if(!in_array($this->extension,$this->allowExt) || !in_array($this->type,$this->allowType)){ $this->message = '该文件类型不允许上传'; return false; } if($this->_uploadFile->size> $this->maxFileSize){ $this->message = '文件过大'; return false; } $path = date('Y-m',time()); if(!file_exists($this->savePath.'https://www.jb51.net/'.$path)){ FileHelper::createDirectory($this->savePath.'https://www.jb51.net/'.$path); } $name = substr(\Yii::$app->security->generateRandomString(),-4,4); $this->filePath = $this->savePath.'https://www.jb51.net/'https://www.jb51.net/article/.$path.'https://www.jb51.net/'.$this->baseName.'--'.$name.'.'.$this->extension; $this->urlPath = '/uploads/images/'https://www.jb51.net/article/.$path.'https://www.jb51.net/'.$this->baseName.'--'.$name.'.'.$this->extension; } public function save(){ if($this->_uploadFile->saveAs($this->filePath)){ $this->CreateThumbnail($this->filePath);//缩放图片 $this->res = true; }else{ $this->res = false; } if($this->res){ $this->message = $this->_uploadFile->baseName.'.'.$this->_uploadFile->extension.'上传成功'; }else{ $this->message = $this->_uploadFile->baseName.'.'.$this->_uploadFile->extension.'上传失败'; } return $this->res; } /** * 获取文件名字 * @return null */ public function getBaseName(){ if($this->_uploadFile){ return $this->_uploadFile->baseName; }else{ return null; } } /** * 返回文件后缀 * @return null */ public function getExtension(){ if($this->_uploadFile){ return $this->_uploadFile->extension; }else{ return null; } } /** * 返回文件类型 * @return mixed */ public function getType(){ if($this->_uploadFile){ return $this->_uploadFile->type; } return null; } /** * 生成保持原图纵横比的缩略图，支持.png .jpg .gif * 缩略图类型统一为.png格式 * $srcFile 原图像文件名称 * $toFile 缩略图文件名称，为空覆盖原图像文件 * $toW 缩略图宽 * $toH 缩略图高 * @return bool */ public static function CreateThumbnail($srcFile, $toFile="", $toW=100, $toH=100) { if ($toFile == "") $toFile = $srcFile; $data = getimagesize($srcFile);//返回含有4个单元的数组，0-宽，1-高，2-图像类型，3-宽高的文本描述。 if (!$data) return false; //将文件载入到资源变量im中 switch ($data[2]) //1-GIF，2-JPG，3-PNG { case 1: if(!function_exists("imagecreatefromgif")) return false; $im = imagecreatefromgif($srcFile); break; case 2: if(!function_exists("imagecreatefromjpeg")) return false; $im = imagecreatefromjpeg($srcFile); break; case 3: if(!function_exists("imagecreatefrompng")) return false; $im = imagecreatefrompng($srcFile); break; } //计算缩略图的宽高 $srcW = imagesx($im); $srcH = imagesy($im); $toWH = $toW / $toH; $srcWH = $srcW / $srcH; if ($toWH <= $srcWH) { $ftoW = $toW; $ftoH = (int)($ftoW * ($srcH / $srcW)); } else { $ftoH = $toH; $ftoW = (int)($ftoH * ($srcW / $srcH)); } if (function_exists("imagecreatetruecolor")) { $ni = imagecreatetruecolor($ftoW, $ftoH); //新建一个真彩色图像 if ($ni) { //重采样拷贝部分图像并调整大小 可保持较好的清晰度 imagecopyresampled($ni, $im, 0, 0, 0, 0, $ftoW, $ftoH, $srcW, $srcH); } else { //拷贝部分图像并调整大小 $ni = imagecreate($ftoW, $ftoH); imagecopyresized($ni, $im, 0, 0, 0, 0, $ftoW, $ftoH, $srcW, $srcH); } } else { $ni = imagecreate($ftoW, $ftoH); imagecopyresized($ni, $im, 0, 0, 0, 0, $ftoW, $ftoH, $srcW, $srcH); } switch ($data[2]) //1-GIF，2-JPG，3-PNG { case 1: imagegif($ni, $toFile); break; case 2: imagejpeg($ni, $toFile); break; case 3: imagepng($ni, $toFile); break; } ImageDestroy($ni); ImageDestroy($im); return $toFile; } }