This maybe a dumb question. I have a site running which allows its users to submit their content.
Some of users are playing with strange characters (to me) which I don't want to see. Here are some of these:
▄ █ ▄ █ ▄ █ ▄ █ ▄
What kind of and how can I trim these characters? I have tried some method like this but how can I do it without having to loose the html special characters like © ® ... etc.
Thank you