Syntax problem in PHP table creation

function Create_Table($testname, $answerarray)
        {
        $sql = "CREATE TABLE $testname (  id SMALLINT(5) NOT NULL AUTO_INCREMENT,  name varchar(30), score int,  PRIMARY KEY (id), UNIQUE id (id))";
        $result = mysql_query($sql) or die("Cant create table: ".mysql_error());
        $numberofquestions = count($answerarray);
        for($i=1 ;$i<=$numberofquestions ; $i++) {

                $newfieldname="q$i";
                $sql = "alter table $testname add column $newfieldname tinyint(1)";
                $result = mysql_query($sql) or die("Cant update table: ".mysql_error());
                }
        }