How to export 20 million records in pdf? - php

Question

I need to export 20 million data in a pdf file. I have used the "WkHtmlToPdf" package
(https://github.com/mikehaertl/phpwkhtmltopdf)
in my yii2 application. I have used Mongo database, I have created a report module in which I need to export the pdf with large data.
Code is working fine but it is taking too much time to write 1,00,000 it takes approx 10 mins so for 20 million approx it takes 20 hours so we are looking for a solution to write 20 million data.
Below is my query to fetch data from mongo:
$query = CannedReport::find()->where(['isParent'=>1]);
$this->load($params);
if (in_array(Yii::$app->user->identity->user_type, ['tenant', 'subtenant'])) {
$query->andWhere(['tm_id' => (string)Yii::$app->user->identity->tm_id]);
// $match['tm_id'] =(string)Yii::$app->user->identity->tm_id;
}
$query->andWhere(['!=', 'callstatus', 'completed']);
$query->andWhere(['hangup' => 'ORIGINATOR_CANCEL']);
$dataProvider = new ActiveDataProvider([
'query' => $query,
'pagination' => false,
'sort' => [
'defaultOrder' => ['start_epoch' => SORT_DESC],
],
]);
if (isset($this->em_id) && !empty($this->em_id)) {
$query->andFilterWhere(['in', 'em_id', $this->em_id]);
}
foreach (['start_epoch', 'end_epoch'] as $epoch) {
if ($epoch == 'start_epoch') {
if (isset($this->start_epoch) && !empty($this->start_epoch)) {
$date = explode(' - ', $this->start_epoch);
} else {
$date[0] = date('Y-m-d H:i:s', strtotime('today - 31 days'));
$date[1] = date('Y-m-d') . " 23:59:59";
$this->start_epoch = implode(' - ', $date);
}
} else {
$date = explode(' - ', $this->{$epoch});
}
if (isset($date[0]) && isset($date[1]) &&
Yii::$app->helper->validateDate($date[0], 'Y-m-d H:i:s') && Yii::$app->helper->validateDate($date[1],
'Y-m-d H:i:s')
) {
$query->andFilterWhere([
'>=',
$epoch,
(string)Yii::$app->helper->currentTimezone($date[0], 'Y-m-d H:i:s')
]);
$query->andFilterWhere([
'<=',
$epoch,
(string)Yii::$app->helper->currentTimezone($date[1], 'Y-m-d H:i:s')
]);
}
unset($date);
}
return $dataProvider;
Pdf generation code
$pdf = new Pdf(array(
'binary' => '/usr/local/bin/wkhtmltopdf',
'ignoreWarnings' => true,
'commandOptions' => array(
'useExec' => true, // Can help on Windows systems
'procEnv' => array(
'LANG' => 'en_US.utf-8',
),
),
));
$options = array(
'dpi' => 96,
'image-quality' => 100,
'disable-smart-shrinking',
'no-outline',
);
$pdf->setOptions($options);
$pdf->addPage($tableHtml);
$detailHeadingHtml = '<div class="row" style="padding-top: 5px;"><h3 style="text-align: center; padding: 5px;">Detailed Records-Call Direction Report</h3><div>';
$pdf->addPage($detailHeadingHtml . '' . $abandonedCallsHtml . '' . $completedCallsHtml . '' . $failedCallsHtml . '' . $transferredCallsHtml . '<table><tr><td align="center"><b>Total Count:</b></td><td align="center"><b>' . $dataProvider->query->count() . '</b></td></tr></table>');
if (!$pdf->send($fileName)) {
$error = $pdf->getError();
echo $error;
}
exit();
Is there any optimized way to create a pdf with such large data using yii2 and mongo?