PHP Regular Expression matching unicode encoding Regular Expression Method

In the php tutorial, the regular expression matches the regular expression method of unicode encoding. Because of the special nature of unicode encoding, the General Chinese or English regular expressions cannot obtain the expected content correctly, here is a professional unicode Regular Expression.

View the unicode encoding diagram.

$ Words = "0123456789 abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrsruvwxyz! @ # $ % ^ & * () _ +-= [],./{} | <>? '"Hello, we ";
$ Otherstr = preg_replace ("// [x {0080}-x {00ff}] +/iu", "", $ words );
Echo 'otherstr: ', $ otherstr;