php不用插件导出

//输出的文件类型为excel  
    header("Content-type:application/vnd.ms-excel");  
    //提示下载  
    header("Content-Disposition:attachement;filename=Report_".date("Ymd").".xls");  
  
    //报表数据  
    $ReportArr = array(    array(1,2,3,4,5),  
                        array('A','B','C','D','E'),  
                        array('up','down','left','right','center'),  
                        array('欢','迎','光','临','我','的','百','度','空','间')  
                    );  
    $ReportContent = '';  
    $num1 = count($ReportArr);  
    for($i=0;$i<$num1;$i++){  
        $num2 = count($ReportArr[$i]);  
        for($j=0;$j<$num2;$j++){  
            //ecxel都是一格一格的，用\t将每一行的数据连接起来  
            $ReportContent .= '"'.$ReportArr[$i][$j].'"'."\t";  
        }  
        //最后连接\n 表示换行  
        $ReportContent .= "\n";  
    }  
    //用的utf-8 最后转换一个编码为gb  
    $ReportContent = mb_convert_encoding($ReportContent,"gb2312","utf-8");  
    //输出即提示下载  
    echo $ReportContent;

第二种参考（选自微擎投票：自己参考用的）
//生成excel表格

protected function exportexcel($data=array(),$title=array(),$filename='report'){
    header("Content-type:application/octet-stream");
    header("Accept-Ranges:bytes");
    header("Content-type:application/vnd.ms-excel");  
    header("Content-Disposition:attachment;filename=".$filename.".xls");
    header("Pragma: no-cache");
    header("Expires: 0");
    //导出xls 开始
    if (!empty($title)){
        foreach ($title as $k => $v) {
            $title[$k]=iconv("UTF-8", "GB2312",$v);
        }
        $title= implode("\t", $title);
        echo "$title\n";
    }
    if (!empty($data)){
        foreach($data as $key=>$val){
            foreach ($val as $ck => $cv) {
                $data[$key][$ck]=iconv("UTF-8", "GB2312", $cv);
            }
            $data[$key]=implode("\t", $data[$key]);
            
        }
        echo implode("\n",$data);
    }
}