如何上传音频和移动在PHP中

Please tell me how to upload an audio file in php?

Problem was that audio is a not move in folder and not upload but insert in database was completely working.

if(isset($_POST['audio']))
{

    extract($_POST);
    $audio=rand().$_FILES['audio']['name'];
    $tname=$_FILES['audio']['tmp_name'];
    $path='upload/audio/'.$audio;
    move_uploaded_file($tname,$path);
    $cmd=Insert("insert into post(type,value,date_time)values('audio','$audio',now()) ");
}