Regular expression that allows letters (like “ñ”) from any language
trying to let users use special characters in other languages such as Spanish or French. I originally had this: "/[^A-Za-z0-9\.\_\- ]/i" and then changed it to "/[^\p{L}\p{N}\.\_\-\(\) ]/i" but still doesn't work. letters such as "ñ" should be allowed. Thanks. Revision: I found that adding a (*UTF8) at the beginning helps solve the problem. So I'm using the following code:"/(*UTF8)[^\p{L}A-Za-z0-9._- ]/i" Revision: After looking at the answers I decided to use: "/[^\p{Xwd}. -]/u". Thanks(It works even with the Chinese alphabet. for latin languages you can use the \p{Latin} character class: /[^