I tried the solution suggested here but it doesn't work in my case.
Used this also
mysql_query("SET character_set_names = 'utf8', SET character_set_results = 'utf8', character_set_client = 'utf8', character_set_connection = 'utf8', character_set_database = 'utf8_general_ci', character_set_server = 'utf8'", $conn);
But didnt solve my problem. I also need to display Greek and still get ???? ???? characters. Any ideas on how to solve this is appreciated!