如何在一個(gè)PHP里把{"song":[{"title":"ht1","picture":"ht2","artist":"ht3","url":"ht4"}]}轉(zhuǎn)換成{"title":"ht1","picture":"ht2","artist":"ht3","url":"ht4"}并顯示出來，求一段可運(yùn)行的完整代碼，感激不盡！