php - Convert encoding from CP1252 to UTF-8 -

my mysql db used 2 web sites: first built in yii, second usual php made site. have usual registration in second site, after submission form results in db non-readable (in russian), after output of user profile results normal russian. yii web site displays results in db (non readable). tried encode via utf8_encode , result unreadable. please tell me how avoid coding issue in yii?

in db declare encoding (utf8 or 1252):

'db'=>array(       'connectionstring' => 'mysql:host=127.0.0.1;dbname=smartworkspace',       'emulateprepare' => true,       'username' => 'root',       'password' => '010101',       'charset' => 'utf8',       'tableprefix' => 'sw_'     ), 

and put header let browser know encoding using show page:

header('content-type: text/html; charset=utf-8'); 

i have in config file affects rest.