Yahtzee

<?php
session_start();
include("mysql_connect.php");
if(empty($_POST)){
//geld inzetten(eerste scherm)
//
//


echo("Hoeveel geld wil je inzetten<form action=".$_SERVER['PHP_SELF']." method=post>");
echo("<input type=hidden value=x name=1><input type=text name=inzet><input type=submit value=start></form>");

}elseif(isset($_POST["1"])){
//stenen kieze(eerste keer)
//
//

if(($_POST["inzet"]<100)){
die("Ongeldig bedrag.<br><a href=yahtzee.php>Terug</a>");
}
$inzet_yahtzee=$_POST["inzet"];
session_register("inzet_yahtzee");
echo("<form action=".$_SERVER['PHP_SELF']." method=post><table border=1 bordercolor=black><tr>");
for($i=1; $i<=5; $i++){
  $rand[$i]=mt_rand(1,6);
  echo("<td>".$rand[$i]."</td>");
}
echo("</tr><tr>");
for($i=1; $i<=5; $i++){

  echo("<td><input type=checkbox name=\"keuze$i\" value=$rand[$i]></td>");
}
echo("</tr></table><input type=hidden value=x name=2><input type=submit value=Doorgaan></form><p>Kies dobbelstenen, eerste keer");


}elseif(isset($_POST["2"])){
//stenen kieze(tweede keer)
//
//

echo("<form action=".$_SERVER['PHP_SELF']." method=post><table border=1 bordercolor=black><tr>");
for($i=1; $i<=5; $i++){
  if(@!isset($_POST["keuze$i"])){
    $gekozen[$i]=false;
     $rand[$i]=mt_rand(1,6);
     echo("<td>".$rand[$i]."</td>");
   }else{
     $gekozen[$i]=true;
     $rand[$i]=$_POST["keuze$i"];
     echo("<td>".$rand[$i]."</td>");
   }
}
echo("</tr><tr>");
for($i=1; $i<=5; $i++){
  $x="";
  if($gekozen[$i]==true){ $x="CHECKED"; }
  echo("<td><input type=checkbox name=\"keuze$i\" value=\"$rand[$i]\" $x></td>");
  }
echo("</tr></table><input type=hidden value=x name=uitslag><input type=submit value=Doorgaan></form><p>Kies uw stenen, laatste keer");

}elseif(isset($_POST["uitslag"])){
//uitslag
//
//


echo("<table border=1 bordercolor=black><tr>");
for($i=1; $i<=5; $i++){
  if(@!isset($_POST["keuze$i"])){
    $gekozen[$i]=false;
     $rand[$i]=mt_rand(1,6);
     echo("<td>".$rand[$i]."</td>");
   }else{
     $gekozen[$i]=true;
     $rand[$i]=$_POST["keuze$i"];
     echo("<td>".$rand[$i]."</td>");
   }
}
$a1=0; $a2=0; $a3=0; $a4=0; $a5=0; $a6=0;
for($i=1; $i<=5; $i++){
if($rand[$i]==1){
$a1=$a1+1;
}elseif($rand[$i]==2){
$a2=$a2+1;
}elseif($rand[$i]==3){
$a3=$a3+1;
}elseif($rand[$i]==4){
$a4=$a4+1;
}elseif($rand[$i]==5){
$a5=$a5+1;
}elseif($rand[$i]==6){
$a6=$a6+1;
}
}

  if($a1==3){ $won[0]="three_of_a_kind"; }
  if($a1==4){ $won[1]="four_of_a_kind"; }
  if($a1==5){ $won[2]="yahtzee";        }
  if($a2==3){ $won[0]="three_of_a_kind"; }
  if($a2==4){ $won[1]="four_of_a_kind"; }
  if($a2==5){ $won[2]="yahtzee";        }
  if($a3==3){ $won[0]="three_of_a_kind"; }
  if($a3==4){ $won[1]="four_of_a_kind"; }
  if($a3==5){ $won[2]="yahtzee";        }
  if($a4==3){ $won[0]="three_of_a_kind"; }
  if($a4==4){ $won[1]="four_of_a_kind"; }
  if($a4==5){ $won[2]="yahtzee";        }
  if($a5==3){ $won[0]="three_of_a_kind"; }
  if($a5==4){ $won[1]="four_of_a_kind"; }
  if($a5==5){ $won[2]="yahtzee";        }
  if($a6==3){ $won[0]="three_of_a_kind"; }
  if($a6==4){ $won[1]="four_of_a_kind"; }
  if($a6==5){ $won[2]="yahtzee";        }
  if(($a1==1) AND ($a2==1) AND ($a3==1) AND ($a4==1) AND ($a5==1)){ $won[3]="large_strait"; }
  if(($a2==1) AND ($a3==1) AND ($a4==1) AND ($a5==1) AND ($a6==1)){ $won[3]="large_strait"; }
  if(isset($won[0]) AND(($a1==2)OR($a2==2)OR($a3==2)OR($a4==2)OR($a5==2)OR($a6==2))){
    $won[4]="full_house";  
    unset ($won[0]);
}

echo("</tr></table>");
for($i=0; $i<=5; $i++){
  if(isset($won[$i])){
   $gewonnen=$i;
   
}
}
if(isset($won[0])){ $winst=$_SESSION["inzet_yahtzee"]; }//je geld terug
elseif(isset($won[1])){ $winst=$_SESSION["inzet_yahtzee"]/100*180; }//80% winst
elseif(isset($won[2])){ $winst=$_SESSION["inzet_yahtzee"]/100*300; }//200% winst

elseif(isset($won[3])){ $winst=$_SESSION["inzet_yahtzee"]/100*150; }//50% winst

elseif(isset($won[4])){ $winst=$_SESSION["inzet_yahtzee"]/100*130; }//30% winst


if(!isset($gewonnen)){
  echo "Helaas, je hebt niks gewonnen";
}else{
  echo "Je hebt ".$won[$gewonnen];
  echo "<br>Je winst is ".$winst;
}
echo("<br><a href=yahtzee.php>Nog een keertje</a>");
}

?>