charset problem

[dizyn]

Hi
I am having charset problem at the moment, if i try:

<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
some of the character which are in Tarkish language don't work
and if i use
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

others don't work.

I even tried:

utf8_decode()
utf8_encode()

any help

[leatherback]

What encoding is the data in that you use, and what encoding do the php files have? They all should match up