如何转动这个：
Array
(
[0] => 1.0 - Classic
[1] => 1.0 - Legends of Azeroth
[2] => 01. Main Theme.mp3
)
进入这个：
1.0 - Classic/1.0 - Legends of Azeroth/01. Main Theme.mp3
注意：
There may be more than 3 keys.
尝试implode （a/k/a join ）：
implode('/', $theArray);