PHPExcel export "Unreadable Content" Excel File in yii2 - php

Question

I used PHPExcel extension in Yii2 project and i have created component of PHPExcel object but this component export "Unreadable Content" Excel file.
I have read all possible solution for this issue from these links:
PHPExcel - .xlsx file downloads unreadable content
PHPExcel creates 'unreadable content'
https://stackoverflow.com/questions/32103447/excel-found-unreadable-content-with-phpexcel
PHPExcel unreadable content
I getting following "Unreadable content" Excel file :
And my code is,
component 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");
}
}
View file 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',
],
],
]);
?>
Controller File 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,
]);
}
........
.....
}
?>
Thanks in Advance.

Answer 1

Its not a valid solution but it works for me..
header("Content-Disposition: attachment; filename=\"$filename\"");
$export =\moonland\phpexcel\Excel::export([
'models' => $exportData,
'columns' => $exportColumns,
'headers' => [
'created_at' => dtTZ()
],
]);

Answer 2

Your file seems a correct xlsx file opened with an editor like notepad++
could be a charcter encoding problem
Try change the encode
if (function_exists('mb_internal_encoding')) {
$oldEncoding=mb_internal_encoding();
mb_internal_encoding('utf8');
}
using a value for cp1250 -- to cp1258
encoding for microsoft in US-EN
(I hope your excel country installation config )