YII2框架中excel表格导出的方法详解

$objPHPExcel->getActiveSheet()->mergeCells('A1:E1');
// 表格填充内容
$objPHPExcel->getActiveSheet()->setCellValue('A1','The quick brown fox.');

$objPHPExcel->getActiveSheet()->mergeCells('A1:E4');
$objPHPExcel->getActiveSheet()->setCellValue('A1','The quick brown fox.');

public function actionExcelRechargeStatistics(){

 //先定义一个excel文件
 $filename = date('【充值统计表】('.date('Y-m-d').'导出)').".xls";
 header("Content-Type: application/vnd.ms-execl");
 header("Content-Type: application/vnd.ms-excel; charset=utf-8");
 header("Content-Disposition: attachment; filename=$filename");
 header("Pragma: no-cache");
 header("Expires: 0");
 //时间条件
 if(empty($params['min'])){
 $time = date('Y-m-d',strtotime("+1 day"));
 $where = ' created < \' '.$time.'\'';
 }else{
 $time = $params['min']+3600*24;
 $time_end = $params['max']+3600*24;
 $where = ' created <= \' '.$time_end.'\' AND created >= \''.$time.'\' ';
 }
 //充值类型列表
 $recharge_type = Recharge::find()->asArray()->all();
 if(empty($recharge_type)){
 $rechargelist[0]= '';
 }else{
 $rechargelist = ArrayHelper::map($recharge_type,'id','recharge_name');
 }
 $rechargelist1 = $rechargelist;
 $count = count($rechargelist1);
 //使用html语句生成显示的格式
 $excel_content = '<meta http-equiv="content-type" content="application/ms-excel; charset=utf-8"/>';
 $excel_content .= '<table border="1" style="font-size:14px;">';
 $excel_content .= '<thead>
   <tr>
   <th rowspan="2">ID</th>
   <th rowspan="2">公司名称</th>
   <th colspan='.$count.'>充值金额</th>
   <th rowspan="2">充值大小</th>
   <th rowspan="2">实际消费</th>
   <th rowspan="2">当前余额</th>
   </tr>
   <tr>
  ';
 foreach ($rechargelist1 as $v => $t){
 $excel_content .= '<th colspan="1">'.$t.'</th>';
 }
 $excel_content .= '</tr>
  </thead>';
 //查找最新的固化数据
 $search = RechargeStatistics::find()->where($where)->asArray()->all();
 if(!empty($search)){
 foreach ($search as $key => $value){
 $search[$key]['recharge'] = unserialize($value['recharge']);
 }
 }
 //html语句填充数据
 if(empty($search)){
 }else{
 foreach ($search as $k) {
 $excel_content .= '<td>'.$k['company_id'].'</td>';
 $excel_content .= '<td>'.$k['company_name'].'</td>';
 foreach ($rechargelist1 as $v=>$t){
 $price = 0;
 foreach ($k['recharge'] as $q=>$w){
  if($w['recharge_id'] == $v){
  $price = $w['price'];
  break;
  }
 }
 $excel_content .= '<td>'.$price.'</td>';
 }
 $excel_content .= '<td>'.$k['total'].'</td>';
 $excel_content .= '<td>'.$k['consume'].'</td>';
 $excel_content .= '<td>'.($k['total']-$k['consume']).'</td></tr>';
 }
 }
 $excel_content .= '</table>';
 echo $excel_content;
 die;
}