php的Unicode正则表达式

Question

I have some text where unicode is written as text like this 我有一些文本，其中unicode是这样写的

There areu25ba 2 boys.

it should be like this 它应该是这样的

There are&#x25ba 2 boys.

Replace 'u' with '&#x' if there is unicode character. 如果存在Unicode字符，则将“ u”替换为“＆＃x”。

Thanks in advance 提前致谢

Answer 1

A naive way would be: 天真的方法是：

preg_replace('/u([0-9a-fA-F]{4})/','&#x$1;',$string);

But I doubt 'udaff' would appreciate it. 但是我怀疑“乌达夫”会感激它。