laravel convert csv file in controller to array code example

Example: convert array to csv laravel

/**
 * Takes in a filename and an array associative data array and outputs a csv file
 * @param string $fileName
 * @param array $assocDataArray     
 */
public function outputCsv($fileName, $assocDataArray)
{
    ob_clean();
    header('Pragma: public');
    header('Expires: 0');
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Cache-Control: private', false);
    header('Content-Type: text/csv');
    header('Content-Disposition: attachment;filename=' . $fileName);    
    if(isset($assocDataArray['0'])){
        $fp = fopen('php://output', 'w');
        fputcsv($fp, array_keys($assocDataArray['0']));
        foreach($assocDataArray AS $values){
            fputcsv($fp, $values);
        }
        fclose($fp);
    }
    ob_flush();
}
// Call function
  $allData = Subscription::all();
  $data = array();
	foreach ($allData as $key => $value) 
	{
		$fields = array( 'S.No' => $value->id, 'Email' => $value->email, 'Date' => date('Y-m-d',strtotime($value->created_at)));
		$data[] = $fields;
	}
	$filename = date('Y-m-d H:i:s').' - subcription_data.csv';
	outputCsv($filename, $data);