Question about variables

greatepier

I am trying to make a multiple choise question from a database.

The form looks like:

print (" <form method=\"post\"><table>
    <tr><td><img src=\"rijles/$Vurl.jpg\" width=$Vbreed height=$Vhoog></td></tr>
    <tr><td>$Vid</td></tr>
    <tr><td>$Vvraag</td></tr>
    <br>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"1\">$Vantwoord1</td></tr>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"2\">$Vantwoord2</td></tr>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"3\">$Vantwoord3</td></tr>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"4\">$Vantwoord4</td></tr>
    <br>
    <tr><td><input type=\"submit\" name=\"antwoord\" value=\" Verstuur \"> </td></tr>
    </table></form>
 ");

After that I want to compare it to the answer hidden in the database $Vantwoord.

// antwoord controleren
if(isset($_POST['antwoord'])) {
   $gegevenantwoord = $_POST['Vantwoord'];
   if ( $gegevenantwoord <> $Vantwoord) {
   echo "Het gegeven antwoord is niet juist<br>";
   echo "Het juiste antwoord was antwoord".$Vantwoord."<br><br>";
   }
   else {
   echo "Het gegeven antwoord was correct<br>";
   }
   }

But somehow the $Vantwoord is not remember and empthy when i compare.
Any idea ?

NogDog

I don't see anywhere in the code you supplied where you set the value of $Vantword.

greatepier

The variable are defined in a database.
Below the code

The echo returns:
1 - - Het gegeven antwoord is niet juist
Het juiste antwoord was antwoord

This means that the $Vantwoord variable from the database is not known ?

// antwoord controleren
if(isset($_POST['antwoord'])) {
   $gegevenantwoord = $_POST['Vantwoord'];

   echo $gegevenantwoord ; echo " - "; echo $Vantwoord ; echo " - ";

   if ( $gegevenantwoord <> $Vantwoord) {
   echo "Het gegeven antwoord is niet juist<br>";
   echo "Het juiste antwoord was antwoord".$Vantwoord."<br><br>";
   }
   else {
   echo "Het gegeven antwoord was correct<br>";
   }
   }

// haal een vraag op
$getvraag=rand(1,$aantalrec);

$DBname=  $dbname;
$Verbinding = mysql_connect ("localhost","$dbuser","$dbpass");
$Opdracht = "SELECT * FROM `vragenlijst` WHERE `id` = '$getvraag'  ";
$Result = mysql_db_query ($DBname, $Opdracht, $Verbinding);

//get information from database
while ($Rij = mysql_fetch_array ($Result) ) {
$Vid= $Rij[id];
$Vvraag = $Rij[vraag];
$Vurl = $Rij[image];
$Vantwoord1= $Rij[antwoord1];
$Vantwoord2= $Rij[antwoord2];
$Vantwoord3= $Rij[antwoord3];
$Vantwoord4= $Rij[antwoord4];
$Vantwoord= $Rij[antwoord];
$Vbreed= $Rij[breed];
$Vhoog= $Rij[hoog];
};

print ("
    <form method=\"post\"><table>
    <tr><td><img src=\"rijles/$Vurl.jpg\" width=$Vbreed height=$Vhoog></td></tr>
    <tr><td>$Vid</td></tr>
    <tr><td>$Vvraag</td></tr>
    <br>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"1\">$Vantwoord1</td></tr>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"2\">$Vantwoord2</td></tr>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"3\">$Vantwoord3</td></tr>
    <tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"4\">$Vantwoord4</td></tr>
    <br>
    <tr><td><input type=\"submit\" name=\"antwoord\" value=\" Verstuur \"> </td></tr>
    </table></form>
 ");

?>

NogDog

In your latest code sample, you are using $Vantword here:

   echo $gegevenantwoord ; echo " - "; echo $Vantwoord ; echo " - ";

   if ( $gegevenantwoord <> $Vantwoord) {

...but you don't define it until later in the code:

$Vantwoord= $Rij[antwoord];

...so when you first use it, it is not set so will give meaningless results. Presumably you could just rearrange the code a bit so that you do the DB query and set those variables before the first part of the code?

greatepier

Presumably you could just rearrange the code

I tried this in various places, but couldn't get it working.

If I add the following code in the form

<tr><td><INPUT type=\"radio\" name=\"Vantwoord\" value=\"4\">$Vantwoord</td></tr>

And then the variable is then visible together with the other variables, so technically it has run through the define stage, but once submitted by the form it is lost.

I could include it in the form, but for a kind of quiz to have the answer visible isn't very handy. Any ideas?