Prova detta
<?php
header('Content-Type: text/html; charset=utf-8');
?>
och sedan i anslutningen
<?php
$dbLink = mysql_connect($argHost, $argUsername, $argPassword);
mysql_query("SET character_set_results=utf8", $dbLink);
mb_language('uni');
mb_internal_encoding('UTF-8');
mysql_select_db($argDB, $dbLink);
mysql_query("set names 'utf8'",$dbLink);
?>