JSON数据、PHP数组 转换 Excel表格

//excel输出
header("Content-type:application/vnd.ms-excel");
header("Content-Disposition:filename=".date("Ymd",time()).".xls");
echo "RealName\t";
echo "Mobile\t";
echo "GradeName\t";
echo "TeachMethod\t";
echo "CreatedOn\t\r\n";

$file_path = "data.txt";
$str = file_get_contents($file_path);
$data = json_decode($str, true);

//var_dump($data);

foreach($data['rows'] as $k=>$rs){
    echo $rs["RealName"]."\t";
    echo $rs["Mobile"]."\t";
    echo $rs["GradeName"]."\t";
    echo $rs["TeachMethod"]."\t";
    echo $rs["CreatedOn"]."\t\r\n";
}

//$filename = '3.txt';
//$handle = fopen($filename, 'rb+');
//
//while(!feof($handle)){
//
//    echo fgets($handle).'<hr/>';

//    $str = fgets($handle);
//
//    $data = json_decode($str, true);
//
//    //var_dump($data);
//
//    foreach($data['rows'] as $k=>$rs){
//        echo $rs["RealName"]."\t";
//        echo $rs["Mobile"]."\t";
//        echo $rs["GradeName"]."\t";
//        echo $rs["TeachMethod"]."\t";
//        echo $rs["CreatedOn"]."\t\r\n";
//    }
//}