<"htmlcode">

<"/images/noimage.gif";//显示文章图片或者默认图片
  $this->_html.='<div class="form-group field-article-author" id="container">';
  $this->_html.=Html::activeLabel($model,$attribute);
  $this->_html.=Html::activeHiddenInput($model,$attribute,['id'=>'hidden_input','value'=>$path]);
  $this->_html .= '<div id="pickfiles" style="height:50px;min-width:50px;max-width: 300px;overflow: hidden;"><img height="50" src="/UploadFiles/2021-04-02/'.$path.'">

3、backend\assets\UploadAsset

注册相关js




<"htmlcode">

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="/UploadFiles/2021-04-02/'+result.path+'">

5、backend\assets\PluploadAsset

注册plupload相关资源




<"htmlcode">

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




<"", $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;
 }
}



以上就是本文的全部内容，希望对大家学习php程序设计有所帮助。

                                
                                

                                    yii2.0,Plupload,缩放,多图上传 
                                

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