Plain text automated email encoding

Have made an automated plaintext email in开发者_如何转开发 php to be sent to the user upon registration. However, the sign off includes an en dash. I have tried &ndash ; &# 8211; and &# x2013; (without spaces) but none of those are working and just showing the code. Any ideas?

Use the unicode equivalent for your dash, must be something like \u2013 or such, you cannot use html entitites since you are not using html ...