Problems with Polish letters Opcje

[doodlebug]

Hello All!
Apologies for my lack of Polish and apologies if this has gone in the wrong forum.
I'm creating a website where you enter your details in text boxes on an .html page, which you then review on a .php page.
Everything has been changed to utf-8.

The problem is when you enter Polish characters in the text box, on the next page when you review the information and say whether it's good or not, the Polish characters show up as "Auml�Auml�Auml�Aring�"

Any idea what the problem could be?

Many thanks in advance

[mrok]

Try use var_dump(variable) in few lines in your code and check if $variable has expected value.
First parameter in preg_replace does not look like correct regex pattern.