PHP/Form running itself without verification

[2DaysAway]

I have an option on my game for a player to add more turns for use. The way I have it set up is after a 48 hour countdown, a link appears, they click the link, they're SUPPOSE to go to another page with a form and an option to select yes or no to verify if they want to add these turns.

 

BUT what happens, they click the link to add the turns and instead of it going to the page, it just runs the script.

 

Here is the script

if (($bonustransfer != "no") && ($answer="yes")){

    if($time < $pimp[bonusturntime]){ $msg="You have to wait before receiving bonus turns"; }
elseif($time < $site[starts]){ $msg="You must wait until this game starts!"; }
elseif($bonustransfer > $user[credit]){ $msg="You dont have that many credits!"; }
  else{
  
$pimp = mysql_fetch_array(mysql_query("SELECT bonusturnsuses,crewjoindate,crewbonusturns,bonusturns,loyality,crew FROM `{$tab[pimp]}` WHERE `id`='$id' AND `rid`='$rid';"))or die("Error : didnt pull pimps info" . mysql_error());
$user = mysql_fetch_array(mysql_query("SELECT credit FROM `{$tab[user]}` WHERE `id`='$id';"))or die("Error : didnt pull credit count" . mysql_error());
$bonustime=$time+172800;//bonus turns every 48 hours

$crewinfo = mysql_fetch_array(mysql_query("SELECT members,totalbtuses FROM `{$tab[crew]}` WHERE `id`='$pimp[crew]' AND `rid`='$rid';"))or die("Error : didnt pull crew info" . mysql_error());

$ct=$crewinfo["members"];
$tcbt=$crewinfo["totalbtuses"];
$cjd=$pimp["crewjoindate"];
$cbt=$pimp["crewbonusturns"];
$btu=$pimp["bonusturnsuses"];
$pcw=$pimp["crew"];
if($pcw<=0){$bt=0;}
else{$bt=10;}
$enddate=$time;
$diff=$enddate-$cjd;
// immediately convert to days
$temp=$diff/86400; // 60 sec/min*60 min/hr*24 hr/day=86400 sec/day
// days
$days=floor($temp);  $temp=24*($temp-$days);
$ply=$pimp["loyality"];
if($pcw<=0){$xbt=0;}
else{$xbt=$days*$bt;}
if($pcw<=0){$lxbt=0;}
else{$lxbt=$bt*$ply;}
$bonusturns=$pimp["bonusturns"]+$cbt+$lxbt+$ct+$tcbt;
$adminmessage="Auto-Response: you received ". $bonusturns ." bonus turns.";
mysql_query("INSERT INTO `{$tab[mail]}` (rid,src,dest,msg,time,inbox) VALUES ('$rid','$adminid','$id','$adminmessage','$time',2);")or die("Error : " . mysql_error("tabmail error"));
mysql_query("UPDATE `{$tab[pimp]}` SET `messages`=messages+1 WHERE `id`='$id' AND `rid`='$rid'")or die("Error : did not update message bin" . mysql_error());
mysql_query("UPDATE `{$tab[pimp]}` SET `bonusturnsuses`=$btu+1 WHERE `id`='$id' AND `rid`='$rid'")or die("Error : did not update bonus turn count" . mysql_error());
mysql_query("UPDATE `{$tab[pimp]}` SET `loyalityturns`=$lxbt WHERE `id`='$id' AND `rid`='$rid'")or die("Error : did not update loyality turn count" . mysql_error());
mysql_query("UPDATE `{$tab[pimp]}` SET `turn`=turn+$bonustransfer+$cbt+$lxbt+$ct+$tcbt, `bonusturntime`=$bonustime WHERE `id`='$id' AND `rid`='$rid'")or die("Error : did not give turns" . mysql_error());
mysql_query("UPDATE `{$tab[pimp]}` SET `crewbonusturns`=crewbonusturns+$xbt WHERE `id`='$id' AND `rid`='$rid'")or die("Error : did not give crew bonus turns" . mysql_error());
mysql_query("UPDATE `{$tab[user]}` SET `credit`=credit-$bonustransfer WHERE `id`='$id'")or die("Error :did not deduct credits from account " . mysql_error());
mysql_query("UPDATE `{$tab[crew]}` SET `totalbtuses`=$btu+1 WHERE `id`='$pimp[crew]'")or die("Error :did not update crew bonusturn usest " . mysql_error());
mysql_query("INSERT INTO `{$tab[credits]}` (id,username,action,time,ip) VALUES ('','$un','$adminmessage','$time','$REMOTE_ADDR');")or die ("Did not INSERT info into credit table   " .mysql_error ());
header("Location: main.php?rid=$rid");
      }
}

 

Here is the form

<form method="post" action="bonuscredits.php?action=bonustransfer">
  <div class="boxdef-hd"> <b>need more turns?</b>
    <div class="boxdef" align="center">
      <table align="center" cellspacing="1" cellpadding="4">
        <tr>
          <td><select name="answer" class="entry">
	  <option class="entry" value="">select</option>
              <option class="entry" value="yes">yes</option>
              <option class="entry" value="no">no</option>
            </select></td>
        </tr>
        <tr>
          <td><input type="hidden" class="entry" size="5" value="<?=$answer?>" name="bonustransfer">
            <input type="submit" class="button" value="transfer"></td>
        </tr>
      </table>
    </div>
  </div>
</form>

 

Can someone please take a look and let me know what I'm doing wrong here. Thank you

[2DaysAway]

Does anyone have any ideas? Please....