问共享主机中的MYSQL不同时区

EN

function db_connect(){
        global $dbhost,$dbuser,$dbpassword,$dbname;
        $link_id = mysql_connect($dbhost,$dbuser,$dbpassword);
        mysql_select_db($dbname);
        if (!$link_id){
            $MYSQL_ERRNO = 0;
            $MYSQL_ERROR = "Connection failed to the host $dbhost";
            return 0;
        }
        else if(!mysql_select_db($dbname)){
            $MYSQL_ERRNO = mysql_errno();
            $MYSQL_ERROR = MYSQL_ERROR();
            return 0;
        }
        else{
            mysql_query("SET SESSION time_zone = '+7:00'");
            return $link_id;
        }
    }