PHP excel export function encapsulation (based on phpexcel class)

1. Encapsulation method

<?php 
namespace app\service;

class Excel 
{
	/** Excel export 
	 * @param $list_arr  Exported data 
	 * @param $title_arr  title （ One dimensional array ）
	 * @param $width_arr  The width of the title （ One dimensional array , and $title_arr Sequence correspondence ）
	 * @param $field_arr  The title corresponds to the field name （ One dimensional array , and $title_arr Sequence correspondence ）
	 * @param $excel_title  Export title 
     * @param $excel_total  Final total 
     * @param $count_all_arr  Each vertical line counts 
	 */
	function set_excel($list_arr,$title_arr,$width_arr=array(),$field_arr,$excel_title,$excel_total="",$count_all_arr=''){
		if(empty($list_arr) || empty($title_arr)){
			die(' Parameter error ');
		}
		$num = array('A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
			'AA','AB','AC','AD','AE','AF','AG','AH','AI','AJ','AK','AL','AM','AN','AO','AP','AQ','AR','AS','AT','AU','AV','AW','AX','AY','AZ',
			'BA','BB','BC','BD','BE','BF','BG','BH','BI','BJ','BK','BL','BM','BN','BO','BP','BQ','BR','BS','BT','BU','BV','BW','BX','BY','BZ'
		);
		require_once Env::get('ROOT_PATH')."vendor/PHPExcel/PHPExcel.php";
		require_once Env::get('ROOT_PATH')."vendor/PHPExcel/PHPExcel/Worksheet/Drawing.php";
		require_once Env::get('ROOT_PATH')."vendor/PHPExcel/PHPExcel/Writer/Excel2007.php";
		$objPHPExcel = new \PHPExcel();
		$objActSheet = $objPHPExcel->getActiveSheet();
		for($i=0;$i<count($title_arr);$i++){
			$objPHPExcel->setActiveSheetIndex(0)->getStyle($num[$i])->getAlignment()->setHorizontal(\PHPExcel_Style_Alignment::HORIZONTAL_CENTER);
			$objPHPExcel->getActiveSheet()->getColumnDimension($num[$i])->setWidth($width_arr[$i]?$width_arr[$i]:30);
			$objActSheet->setCellValue($num[$i].'1', $title_arr[$i]);
		}
		$objPHPExcel->getActiveSheet()->getStyle('A1:'.$num[count($title_arr)-1].'1')->applyFromArray(array('font' => array('bold' => true)));
		foreach ($list_arr as $k=>$v){
			$k += 2;
			for($j=0;$j<count($title_arr);$j++){
				$objActSheet->setCellValue($num[$j] . $k,  $v[$field_arr[$j]]);
			}
		}
		if($count_all_arr){			
			for($l=0;$l<count($count_all_arr);$l++){
				$number = count($list_arr)+2;
				$objActSheet->setCellValue($num[$l] . $number,  $count_all_arr[$l]);
			}
		}
		if($excel_total){
            $objActSheet->setCellValue('A'.(count($list_arr)+2),  " total ");
		    $cell = "B".(count($list_arr)+2).":D".(count($list_arr)+2);
            $objActSheet->setCellValue('B'.(count($list_arr)+2),  $excel_total)->mergeCells($cell);
        }

		$date = date("Y-m-d H:i:s", time());
		$fileName = iconv("utf-8", "gb2312", $excel_title . "_{$date}.xls");
		$objPHPExcel->setActiveSheetIndex(0);
		header('Content-Type: application/vnd.ms-excel');
		header("Content-Disposition: attachment;filename=\"$fileName\"");
		header('Cache-Control: max-age=0');
		$objWriter = \PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
		$objWriter->save('php://output'); // The file is downloaded through the browser 
	}
	
	
}

2. Calling method

<?php

function excel(){
    $title_arr = [' The order no. ',' The name of the restaurant ',' Dimension type ',' Ledger user ',' Amount incurred ',' Sub Ledger amount ',' Current balance ',' state ',' Trading hours ',' Split time '];
	$width_arr = ['25','25','15','15','10','10','10','10','20','20'];
	$field_arr = ['order_id','restaurant_name','fz_type_name','username','order_money','fz_money','current_balance','state_name','created_time','use_time'];
	$excel = new Excel();
	$excel->set_excel($list, $title_arr, $width_arr, $field_arr, ' Ledger records ','');

}