[PHP] char set ?

This Q is possibly rather HTML (is there a good list for that...) anyways; Im in Sweden, and have done som pages with Swedish text, however our special (weird) characters åäö comes out wrong when displayd in browser, would be nice if I could tag the text and keep the file as is rather than

Re: [PHP] Re: PHP vs JAVA

Hi, my I shake the subject a little; Ive been doing some PHP and found it ok to work with not so much fuss, but that was PHP4, what about PHP5 ? Dont really checked the difference but made a short-scan and found that it had be screwed around with ? Any think, should I change to 5 ? BR