PHPExcel esportazione "Contenuto illeggibile" File Excel in yii2

Question

Ho utilizzato l'estensione PHPExcel nel progetto Yii2 e ho creato il componente dell'oggetto PHPExcel ma questo componente esporta il file Excel "Contenuto illeggibile".

Ho letto tutte le possibili soluzioni per questo problema da questi link:

1. PHPExcel - .xlsx file downloads unreadable content
2. PHPExcel creates 'unreadable content'
3. https://stackoverflow.com/questions/32103447/excel-found-unreadable-content-with-phpexcel
4. PHPExcel unreadable content

ho sempre seguito "contenuto illeggibile" Excel file:

E il mio codice è,

componente ExcelGrid.php:

<?php  
namespace app\components; 

use Yii; 
use Closure; 
use yii\i18n\Formatter; 
use yii\base\InvalidConfigException; 
use yii\helpers\Url; 
use yii\helpers\Html; 
use yii\helpers\Json; 
use yii\helpers\ArrayHelper; 
use yii\widgets\BaseListView; 
use yii\base\Model; 
use \PHPExcel; 
use \PHPExcel_IOFactory; 
use \PHPExcel_Settings; 
use \PHPExcel_Style_Fill; 
use \PHPExcel_Writer_IWriter; 
use \PHPExcel_Worksheet; 

class ExcelGrid extends \yii\grid\GridView 
{ 
    public $columns_array; 
    public $properties; 
    public $filename='excel'; 
    public $extension='xlsx'; 
    private $_provider; 
    private $_visibleColumns; 
    private $_beginRow = 1; 
    private $_endRow; 
    private $_endCol; 
    private $_objPHPExcel; 
    private $_objPHPExcelSheet; 
    private $_objPHPExcelWriter; 

    public function init(){ 
     parent::init(); 
    } 

    public function run(){ 
     //$this->test(); 
     if (function_exists('mb_internal_encoding')) { 
      $oldEncoding=mb_internal_encoding(); 
      mb_internal_encoding('utf8'); 
     } 
     ob_start(); 
     $this->init_provider(); 
     $this->init_excel_sheet(); 
     $this->initPHPExcelWriter('Excel2007'); 
     $this->generateHeader(); 
     $row = $this->generateBody(); 
     $writer = $this->_objPHPExcelWriter; 
     $this->setHttpHeaders(); 
     ob_end_clean(); 
     $writer->save('php://output');  
     if (function_exists('mb_internal_encoding')) 
      mb_internal_encoding($oldEncoding); 
exit; 
     Yii::$app->end(); 
     //$writer->save('test.xlsx'); 
     parent::run(); 
    } 

    public function init_provider(){ 
     $this->_provider = clone($this->dataProvider); 
    } 
    public function init_excel_sheet(){ 
     $this->_objPHPExcel=new PHPExcel(); 
     $creator = ''; 
     $title = ''; 
     $subject = ''; 
     $description = 'Excel Grid'; 
     $category = ''; 
     $keywords = ''; 
     $manager = ''; 
     $created = date("Y-m-d H:i:s"); 
     $lastModifiedBy = ''; 
     extract($this->properties); 
     $this->_objPHPExcel->getProperties() 
     ->setCreator($creator) 
     ->setTitle($title) 
     ->setSubject($subject) 
     ->setDescription($description) 
     ->setCategory($category) 
     ->setKeywords($keywords) 
     ->setManager($manager) 
     //->setCompany($company) 
     ->setCreated($created) 
     ->setLastModifiedBy($lastModifiedBy); 
     $this->_objPHPExcelSheet = $this->_objPHPExcel->getActiveSheet(); 
    } 
    public function initPHPExcelWriter($writer) 
    { 
     $this->_objPHPExcelWriter = PHPExcel_IOFactory::createWriter(
     $this->_objPHPExcel, 
     $writer 
     ); 
    } 
    public function generateHeader(){ 
     $this->setVisibleColumns(); 
     $sheet = $this->_objPHPExcelSheet; 
     $colFirst = self::columnName(1); 
     $this->_endCol = 0; 
     foreach ($this->_visibleColumns as $column) { 
      $this->_endCol++; 
      $head = ($column instanceof \yii\grid\DataColumn) ? $this->getColumnHeader($column) : $column->header; 
      $cell = $sheet->setCellValue(self::columnName($this->_endCol) . $this->_beginRow, $head, true); 
     } 
     $sheet->freezePane($colFirst . ($this->_beginRow + 1)); 
    } 

    public function generateBody() 
    { 
     $columns = $this->_visibleColumns; 
     $models = array_values($this->_provider->getModels()); 
     if (count($columns) == 0) { 
     $cell = $this->_objPHPExcelSheet->setCellValue('A1', $this->emptyText, true); 
     $model = reset($models); 
     return 0; 
     } 
     $keys = $this->_provider->getKeys(); 
     $this->_endRow = 0; 
     foreach ($models as $index => $model) { 
      $key = $keys[$index]; 
      $this->generateRow($model, $key, $index); 
      $this->_endRow++; 
     } 
     // Set autofilter on 
     $this->_objPHPExcelSheet->setAutoFilter(
     self::columnName(1) . 
     $this->_beginRow . 
     ":" . 
     self::columnName($this->_endCol) . 
     $this->_endRow 
     ); 
     return ($this->_endRow > 0) ? count($models) : 0; 
    } 

    public function generateRow($model, $key, $index) 
    { 
     $cells = []; 
     /* @var $column Column */ 
     $this->_endCol = 0; 
     foreach ($this->_visibleColumns as $column) { 
     if ($column instanceof \yii\grid\SerialColumn || $column instanceof \yii\grid\ActionColumn) { 
      continue; 
     } else { 
      $format = $column->format; 
      $value = ($column->content === null) ? 
      $this->formatter->format($column->getDataCellValue($model, $key, $index), $format) : 
      call_user_func($column->content, $model, $key, $index, $column); 
     } 
     if (empty($value) && !empty($column->attribute) && $column->attribute !== null) { 
      $value =ArrayHelper::getValue($model, $column->attribute, ''); 
     } 
     $this->_endCol++; 
     $cell = $this->_objPHPExcelSheet->setCellValue(self::columnName($this->_endCol) . ($index + $this->_beginRow + 1), 
     strip_tags($value), true); 
     } 
    } 

    protected function setVisibleColumns() 
    { 
     $cols = []; 
     foreach ($this->columns as $key => $column) { 
      if ($column instanceof \yii\grid\SerialColumn || $column instanceof \yii\grid\ActionColumn) { 
       continue; 
      } 
      $cols[] = $column; 
     } 
     $this->_visibleColumns = $cols; 
    } 

    public function getColumnHeader($col) 
    { 
     if(isset($this->columns_array[$col->attribute])) 
      return $this->columns_array[$col->attribute]; 

     /* @var $model yii\base\Model */ 
     if ($col->header !== null || ($col->label === null && $col->attribute === null)) { 
      return trim($col->header) !== '' ? $col->header : $col->grid->emptyCell; 
     } 
     $provider = $this->dataProvider; 
     if ($col->label === null) { 
      if ($provider instanceof ActiveDataProvider && $provider->query instanceof ActiveQueryInterface) { 
      $model = new $provider->query->modelClass; 
      $label = $model->getAttributeLabel($col->attribute); 
      } else { 
       $models = $provider->getModels(); 
       if (($model = reset($models)) instanceof Model) { 
       $label = $model->getAttributeLabel($col->attribute); 
       } else { 
       $label =$col->attribute; 
       } 
      } 
     } else { 
      $label = $col->label; 
     } 
     return $label; 
    } 
    public static function columnName($index) 
    { 
     $i = $index - 1; 
     if ($i >= 0 && $i < 26) { 
      return chr(ord('A') + $i); 
     } 
     if ($i > 25) { 
      return (self::columnName($i/26)) . (self::columnName($i % 26 + 1)); 
     } 
     return 'A'; 
    } 

    protected function setHttpHeaders() 
    { 
     header("Cache-Control: no-cache"); 
     header("Pragma: no-cache"); 
     header("Content-Type: application/{$this->extension}; charset=utf-8"); 
     header("Content-Disposition: attachment; filename={$this->filename}.{$this->extension}"); 
     header("Expires: 0"); 
    } 
} 

Visualizza file di countryExcel.php:

<?php 

\app\components\ExcelGrid::widget([ 
    'dataProvider' => $dataProvider, 
    'filterModel' => $searchModel, 
    'extension'=>'xlsx', 
    'filename'=>'country-list'.date('Y-m-dH:i:s'), 
    'properties' =>[ 
    //'creator' =>'', 
    //'title' => '', 
    //'subject' => '', 
    //'category' => '', 
    //'keywords' => '', 
    //'manager' => '', 
    ], 
    'columns' => [ 
     ['class' => 'yii\grid\SerialColumn'], 

     'country_name', 
     [ 
      'attribute' => 'created_at', 
      'value' => function ($data) { 
       return Yii::$app->formatter->asDateTime($data->created_at); 
      }, 
     ], 
     [ 
      'attribute' => 'created_by', 
      'value' => 'createdBy.user_login_id', 
     ], 
     [ 
      'attribute' => 'updated_at', 
      'value' => function ($data) { 
       return (!empty($data->updated_at) ? Yii::$app->formatter->asDateTime($data->updated_at) : Yii::t('stu', ' (not set) ')); 
      }, 
     ], 
     [ 
      'attribute' => 'updated_by', 
      'value' => 'updatedBy.user_login_id', 
     ], 
    ], 
]); 

?> 

collezione di dati CountryController.php:

<?php 

class CountryController extends Controller 
{ 

    ..... 
    ....... 

    public function actionExcel() 
    { 
     $searchModel = new CountrySearch(); 
     $dataProvider = $searchModel->search(Yii::$app->request->queryParams); 

     return $this->renderPartial('CountryExportExcel', [ 
      'searchModel' => $searchModel, 
      'dataProvider' => $dataProvider, 
     ]); 
    } 

    ........ 
    ..... 
} 

?> 

Grazie in anticipo.

Answer 1

Il file sembra un file XLSX corretto aperta con un editor come Notepad ++ potrebbe essere un problema di codifica charcter

Prova cambiare la codifica

if (function_exists('mb_internal_encoding')) { 
     $oldEncoding=mb_internal_encoding(); 
     mb_internal_encoding('utf8'); 
    } 

utilizzando un valore per cp1250 - a cp1258

codifica per microsoft in US-EN
(Spero che la configurazione di installazione del paese di Excel)