April 15, 2015

In this article, we are going to discuss about How to export the grid view data in to excel in YII Frameworkk 2.0. The Yii PHP project started on January 1, 2008, in order to fix some drawbacks of the PRADO framework.

For example, in its early versions PRADO was slow when handling complex pages, had a steep learning curve and many controls were difficult to customize, while Yii was much more efficient at that time. In October 2008, after ten months of private development, the first alpha version of Yii was released. On December 3, 2008, Yii 1.0 was formally released.

Step 1 : Install PHP Excel In Yiiframework 2.0

Add below line in composer.json and update composer to install phpoffice excel.

"require": {
    ......
    "phpoffice/phpexcel": "*"
    ......
}

Step 2 : Excel Gridview Class In Yiiframework 2.0

Create a class file with name 'ExcelGrid.php' by extending the basic GridView class.

<?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();
$this->init_provider();
$this->init_excel_sheet();
$this->initPHPExcelWriter('Excel2007');
$this->generateHeader();
$row = $this->generateBody();
$writer = $this->_objPHPExcelWriter;
$this->setHttpHeaders();
        $writer->save('php://output');
        Yii::$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("Expires: 0");
header("Pragma: no-cache");
header("Content-Type: application/{$this->extension}");
header("Content-Disposition: attachment; filename={$this->filename}.{$this->extension}");
    }
}


Add the above class in 'project/components' folder and defined namespace as

namespace app\components;

Step 3 : Gridview To Excel In Yiiframework 2.0

After completed above steps, Just you have to call 'ExcelGrid' widget using namespace to export data as excel in yii2.

Excel.php

<?php
 \app\components\ExcelGrid::widget([ 
        'dataProvider' => $dataProvider,
        'filterModel' => $searchModel,
//'extension'=>'xlsx',
//'filename'=>'excel',
'properties' =>[
//'creator' =>'',
//'title' => '',
//'subject' => '',
//'category' => '',
//'keywords' => '',
//'manager' => '',
],
        'columns' => [
            ['class' => 'yii\grid\SerialColumn'],
'username',
            'createdby',
            'createdon',
        ],
    ]);
?>

Controller.php

<?php
............
class CategoryController extends Controller
    public function actionExcel()
    {
        $searchModel = new categorySearch();
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

        return $this->renderPartial('excel', [
            'searchModel' => $searchModel,
            'dataProvider' => $dataProvider,
        ]);
    }
    public function actionIndex()
    {
        $searchModel = new categorySearch();
        $dataProvider = $searchModel->search(Yii::$app->request->queryParams);

        return $this->render('index', [
            'searchModel' => $searchModel,
            'dataProvider' => $dataProvider,
        ]);
    }
............
?>

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