else if出错了，怎么解决？

Question

public function upload(){
$var=$_FILES['photo']['name'];
import('ORG.Net.UploadFile');
$upload = new UploadFile();// 实例化上传类
$upload->maxSize = 3145728 ;// 设置附件上传大小
$upload->allowExts = array('jpg', 'gif', 'png', 'jpeg', 'bmp','mp3','wav');// 设置附件上传类型
$upload->savePath = './TL_music/Uploads/image/';// 设置图片附件上传目录
$upload->audioPath = './TL_music/Uploads/audio/';// 设置音频附件上传目录
//缩略图

$upload->thumb = true;
$upload->thumbMaxWidth = '50,200';
$upload->thumbMaxHeight = '50,200';

//子目录
$upload->autoSub=true;
$upload->subType='date';

if(!in_array(",$var)||!in_array(",$_FILES['song']['name'])){

    if(!$upload->upload()) {// 上传错误提示错误信息

        $this->error($upload->getErrorMsg());
        die;
    }else{// 上传成功 获取上传文件信息
        $info =  $upload->getUploadFileInfo();
        if(!in_array(",$var)&&!in_array(",$_FILES['song']['name'])){
            return $this->info[1]['savename'];
            }
        else if(!in_array(",$var)){

            return $this->info[0]['savename'];
            }

        else{ return false;}
       }
}
else {
        return false;
        }
}

Answer 1

else if出错了，是什么错误呢？编译出错，还是运行出错？