CI 框架下 php 数据库数据导入excel

view层（JS）：

$("#download_excel_archieve_btn").click(function (e) {
            var url = "";
            var xhr = new XMLHttpRequest();
            var params = $("#form").serialize();
            xhr.open('POST', url, true);
            xhr.responseType = 'arraybuffer';
            xhr.onload = function () {
                if (this.status === 200) {
                    var filename = "";
                    var disposition = xhr.getResponseHeader('Content-Disposition');
                    if (disposition && disposition.indexOf('attachment') !== -1) {
                        var filenameRegex = /filename[^;=\n]*=((['"]).*?\2|[^;\n]*)/;
                        var matches = filenameRegex.exec(disposition);
                        if (matches != null && matches[1]) filename = matches[1].replace(/['"]/g, '');
                    }
                    var type = xhr.getResponseHeader('Content-Type');
                    var blob = new Blob([this.response], {
                        type: type
                    });
                    if (typeof window.navigator.msSaveBlob !== 'undefined') {

                        window.navigator.msSaveBlob(blob, filename);
                    } else {
                        var URL = window.URL || window.webkitURL;
                        var downloadUrl = URL.createObjectURL(blob);

                        if (filename) {
                            var a = document.createElement("a");
                            if (typeof a.download === 'undefined') {
                                window.location = downloadUrl;
                            } else {
                                a.href = downloadUrl;
                                a.download = filename;
                                document.body.appendChild(a);
                                a.click();
                            }
                        } else {
                            window.location = downloadUrl;
                        }
                        setTimeout(function () {
                            URL.revokeObjectURL(downloadUrl);
                        }, 100);
                    }
                }
            };
            xhr.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
            xhr.send(params);
            e.stopPropagation();
            return false;
        });
        

controller层：

public function download_excel_all()
    {
        //获取前段传递的数据
        $begin_time = $this->input->post('begin_time');
        $end_time = $this->input->post('end_time');
        $client_type = $this->input->post('client_type');
        $app_version = $this->input->post('appversion');
        $uid = $this->input->post('uid');
        $event_type = $this->input->post('event_type');
        $limit = 3000;
        //判断数据
        if (empty($begin_time ))
        {
            $begin_time =NULL;
        }
        if (empty($end_time))
        {
            $end_time = NULL;
        }
        if (empty($client_type))
        {
            $client_type = NULL;
        }
        if (empty($appversion))
        {
            $app_version = NULL;
        }
        if (empty($uid))
        {
            $uid = NULL;
        }
        if (empty($event_type))
        {
            $event_type = NULL;
        }
        //加载类库
        $this->load->library('PHPExcel');
        //查询加载数据
        $this->load->model('errorlog/Report_model');
        $exceldata = $this->Report_model->get($begin_time,$end_time,$this->partner_id,$uid,$event_type,$app_version,$client_type,$offset, $limit);
        if($exceldata['data'] == FALSE)
        {
            $this->load->vars('error','没有统计数据');
            
        }
        array_unshift($exceldata['data'], array_keys($exceldata['data'][0]));
        $row = 1;
        $this->phpexcel = new PHPExcel();
        do
        {
            $col = 0;
            $row_data = current($exceldata['data']);
            foreach($row_data as $value)
            {
                $this->phpexcel->getActiveSheet()->setCellValueByColumnAndRow($col, $row, $value);
                $col++;
            }
            $row++;
        }while(next($exceldata['data']));
        $objWriter = new PHPExcel_Writer_Excel2007($this->phpexcel);
        header('Content-type: application/vnd.ms-excel');
        header('Content-Disposition: attachment; filename="error_report.xlsx"');
        $objWriter->save('php://output');
        
    }
    

model层：
/*

• 获取错误报告数据
• $client_type是客户端的类型：1，PC端；2，苹果手机；16，Android手机

*/
public function get($begin_time = NULL, $end_time = NULL, $partner_id = NULL, $uid = NULL, $event_type = NULL, $app_version = NULL, $client_type = 1, $offset = 0, $limit = 10)
{

$conditions = array('1' => '1');
if(isset($begin_time))
{
    $conditions['postime >= '] = $begin_time;
}

if(isset($end_time))
{
    $conditions['postime <= '] = $end_time;
}

if(isset($partner_id))
{
    $conditions['parnerid'] = $partner_id;
}

if(isset($uid))
{
    $conditions['uid'] = $uid;
}

if(isset($event_type))
{
    $conditions['eventtype'] = $event_type;
}

if(isset($app_version))
{
    $conditions['appver'] = $app_version;
}

if(isset($client_type))
{
    $conditions['clienttype'] = $client_type;
}

$query = $this->db->select('count(*) as total', FALSE)
    ->from('client_exception_report')
        ->where($conditions)
        ->get();
if($query == FALSE)
{
    return FALSE;
}
$row = $query->first_row('array');
$query->free_result();

$query = $this->db->select('*, module, eventtype', FALSE)
    ->from('client_exception_report')
        ->where($conditions)
        ->order_by('postime', 'desc')
        ->limit($limit, $offset)
        ->get();
if($query == FALSE)
{
    return FALSE;
}
$rs['data'] = $query->result_array();
$rs['total'] = $row['total'];
$query->free_result();

//查出module_description（模块描述）和event_description（事件描述）
if($rs['total'] != 0)
{    
    $eventtypes = $modules = array();
    foreach($rs['data'] as $row)
    {
        if(!isset($modules[$row['module']]))
            $modules[$row['module']] = $row['module'];
        
        if(!isset($eventtypes[$row['module']]))
            $eventtypes[$row['eventtype']] = $row['eventtype'];
    }
    
    $query = $this->db->select('description as module_description, module_id', FALSE)
        ->from('event_list')
            ->where_in('module_id', $modules)
            ->get();
    if($query == FALSE)
    {
        return FALSE;
    }
    $_rs = $query->result_array();
    $module_array = array();
    foreach($_rs as $key => $row)
    {
        $module_array[$row['module_id']] = $row['module_description'];
    }
    $query->free_result();
    
    foreach($rs['data'] as $key => $row)
    {
        $rs['data'][$key]['module_description'] = $module_array[$rs['data'][$key]['module']];
    }
    
    $query = $this->db->select('description as event_description, event_id', FALSE)
        ->from('event_list')
            ->where_in('event_id', $eventtypes)
            ->get();
    if($query == FALSE)
    {
        return FALSE;
    }
    $_rs = $query->result_array();
    $event_array = array();
    foreach($_rs as $key => $row)
    {
        $event_array[$row['event_id']] = $row['event_description'];
    }
    $query->free_result();
     
    foreach($rs['data'] as $key => $row)
    {
        $rs['data'][$key]['event_description'] = $event_array[$rs['data'][$key]['eventtype']];
    }
}

return $rs;

}