$answer){
//Check the answer hasn't already been submitted.
$testQuery=mysql_query("select count(id) as c from ".$mysqlAnswerTable." where sn=".$_SESSION['sn']." and question=".$question);
if(mysql_error()){ echo "Please report this to the administrator: ".mysql_error(); die; }
if(mysql_result($testQuery,0,'c')!=0) {mysql_close();
header("location:".$nextQuestionURL);
die();
};
$query="insert into ".$mysqlAnswerTable."(sn,course,question,answer,tstamp) values('".mysql_escape_string($_SESSION['sn'])."','".mysql_escape_string($_SESSION['course'])."',".$question.",'".mysql_escape_string($answer)."',".time().")";
mysql_query($query);
if(mysql_error()){ echo "Please report this to the administrator: ".mysql_error(); die; }
}
//Go to the next question.
mysql_close();
header("location:".$nextQuestionURL);
die();
}
else if(isset($_POST['Submit'])) $flag=1;
?>
Question 1
What is the difference between 'speed' and 'velocity'?
A. 'Speed' is how fast something moves, 'velocity' is how speed changes over time.
B. 'Speed' is just the common word for 'velocity', they're exactly the same thing.
C. 'Speed' is just how fast something moves, 'velocity' is speed with a direction attached to it.
D. 'Speed' is how fast something moves with a direction attached to it, 'velocity' is just how fast something moves.
