tp5使用PHPexcel扩展导出excel表

1，使用composer安装phpexcel包:

composer require phpoffice/phpexcel

2，在控制器中创建方法：

（1）使用PHPexcel扩展。代码如下

 /**
     * 导出excel表格（默认格式）
     *
     * @param   array    $columName    第一行的列名称
     * @param   array    $list         二维数组
     * @param   string   $setTitle    sheet名称
     * @return
     * @author  Tggui <tggui@vip.qq.com>
     */
    private function exportExcel1($columName, $list, $fileName='demo', $setTitle='Sheet1'){

       vendor('phpoffice.phpexcel.Classes.PHPexcel');
       vendor('phpoffice.phpexcel.Classes.PHPexcel.IOFactory');

        if ( empty($columName) || empty($list) ) {
            return '列名或者内容不能为空';
        }
        if ( count($list[0]) != count($columName) ) {
            return '列名跟数据的列不一致';
        }
        $fileName = iconv("utf-8", "gb2312", $fileName);
        //实例化PHPExcel类
        $PHPExcel    =    new \PHPExcel();
        //获得当前sheet对象
        $PHPSheet    =    $PHPExcel    ->    getActiveSheet();
        //定义sheet名称
        $PHPSheet    ->    setTitle($setTitle);

        //excel的列 这么多够用了吧？不够自个加 AA AB AC ……
        $letter        =    [
            'A','B','C','D','E','F','G','H','I','J','K','L','M',
            'N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
        ];
        //把列名写入第1行 A1 B1 C1 ...
        for ($i=0; $i < count($list[0]); $i++) {
            //$letter[$i]1 = A1 B1 C1  $letter[$i] = 列1 列2 列3
            $PHPSheet->setCellValue("$letter[$i]1","$columName[$i]");
        }
        //内容第2行开始
        foreach ($list as $key => $val) {
            //array_values 把一维数组的键转为0 1 2 3 ..
            foreach (array_values($val) as $key2 => $val2) {
                //$letter[$key2].($key+2) = A2 B2 C2 ……
                $PHPSheet->setCellValue($letter[$key2].($key+2),$val2);
            }
        }
        //生成2007版本的xlsx
        $PHPWriter = \PHPExcel_IOFactory::createWriter($PHPExcel,'Excel2007');
        header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
        header('Content-Disposition: attachment;filename='.$fileName.'.xlsx');
        header('Cache-Control: max-age=0');
        $PHPWriter->save("php://output");
        exit;
    }

2），自定义函数，不使用PHPexcel扩展。代码如下：

/**
     * 导出excel表格
     *
     * @param   array    $columName    第一行的列名称
     * @param   array    $list         二维数组
     * @param   string   $setTitle    sheet名称
     * @return
     * @author  Tggui <tggui@vip.qq.com>
     */
    public function  exportExcel($columName, $data, $fileName='demo', $setTitle='Sheet1'){
        $table = '<table border=1>';
        if(!empty($columName) && is_array($columName)){
            $table .= "<thead><tr>";
            foreach($columName as $key=>$value){
            $table .= "<th style='background:#badffb'>{$value}</th>";
            }
            $table .= "</tr></thead>";
        }
        $table .= "<tbody>";
        if(!empty($data) && is_array($columName)){
            foreach($data as $k=>$v){
                $table .= "<tr>";
                foreach($v as $vk=>$vv){
            $table .= "<td>{$vv}</td>";
            }        

        $table .= "</tr>";
            }
        }
        $table .= "</tbody></table>";

        //通过header头控制输出excel表格
        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control:must-revalidate, post-check=0, pre-check=0");
        header("Content-Type:application/force-download");
        header("Content-Type:application/vnd.ms-execl");
        header("Content-Type:application/octet-stream");
        header("Content-Type:application/download");
        header('Content-Disposition:attachment;filename="'.$fileName.'.xls"');
        header("Content-Transfer-Encoding:binary");
        echo $table;
    }
}

3，创建导出测试方法：

/**
 * @method   导出测试方法
 */
public function connectOrder()
  {
      //连接数据库获取数据
    $clt_db = Db::connect('clt_db');
    $data = $clt_db->name('admin')
          ->field('username,extension,email,tel')
          ->select();
    //第一行的列数据
    $header = array('用户名', '工号', '邮箱', '电话号码');

    //调用导出方法
    self::exportExcel1($header, $data, date('Y-m-d'));
  }

参考于：https://blog.csdn.net/dream__skyfly/article/details/85226194