1. 如果是高中的单词，你可以找funch要。第一个貌似用到正则，表示不会。不管输入什么456是固定的？
2. 帮我翻译下面这段话我就告诉你。否则我没有时间。我还有很多内容要翻译。
Druids have had a long history of being connected with Stonehenge at the solar festivals and many feel it to be an important temple. However, because Druids feel too the importance of tribe and locality, those who don't live close to Stonehenge tend to have a less connection with it, if any at all, preferring temples (ancient and modern) closer to home.
3. $n=$_POST['n'];
echo str_replace('123','456',$n);