I'm trying to write a blackjack game, for my website, www.the-streets-of-london.co.uk. However i have no idea where to start. I've tried looking on the internet for tutorials or something, or scripts so i can get a basic idea, but there seems to be none!

So if anyone has any suggestions, or even links to where i can get a script to work from, it will be appreciated!

Thanks

Also, i need a script that keeps repeating a search on a table in my database for a new entry for it. however the only way i could think of doing this was by refreshing the page, and that justs causes problems. How could i do that?

    Wouldn't be hard to make. Grab some cards, put some [man]rand[/man]om logic in there, do the math. Pretty simple. Start adding simple functions here and there for splitting aces, double down, etc if you wanna get fancy.

      I have finally gathered some code together to create the blackjack script. The only problem is, i get lots of errors, and i don't know how i can remedy them.

      Also, i'm not sure whether in the code i can add the form, for which will have hit, stick or new deal buttons, in the getinput() function.

      Any help will be great.

      <?
main();

function init() { 

print "\n*** Resuffling Deck *** \n\n"; 

for ($y = 0; $y < 4; $y++) { 

    switch($y) { 

        case 0:  
            $suit = 'C';  
            break; 
        case 1:  
            $suit = 'S';  
            break; 
        case 2:  
            $suit = 'H';  
            break; 
        case 3:  
            $suit = 'D';  
            break; 

    }                 

    for ($i = 1; $i <= 13; $i++) { 

        if ($i <= 10) $deck[$suit][$i] = $i; 

        switch($i) { 
            case 1: 
                $deck[$suit][$i] = 'A'; 
                break; 
            case 11: 
                $deck[$suit][$i] = 'J'; 
                break; 
            case 12: 
                $deck[$suit][$i] = 'Q'; 
                break; 
            case 13: 
                $deck[$suit][$i] = 'K'; 
                break; 
        } 

    } 

} 

srand ((double) microtime() * 1000000); 

  return $deck; 
} 

function draw() { 

    global $deck; 

    static $usedcards = 0; 

    if ($usedcards >= 52) { 

        $deck = init(); 
        $usedcards = 0; 
    } 

    $face = array_rand($deck); 
    $id = array_rand($deck[$face]); 


    $val = ($id >= 10) ? 10 : $id; 
    $result = array('card'=>$deck[$face][$id].' '.$face,'val'=>$val); 

    unset($deck[$face][$id]); 
    if (count($deck[$face]) < 1) { 
        unset($deck[$face]); 
        } 

    $usedcards++; 
    return $result;     
} 

function hand_value($hand) { 

foreach ($hand as $val) { 
// $aces = "0";

    if ($val['val'] != 1) { 
        $result += $val['val']; 
    } else { 
        $aces++; 
    } 
} 

for ($i = 0; $i < $aces; $i++) { 

    $result += (($result + 11) > 21) ? 1 : 11; 

} 

return $result; 

} 

function show_cards($dealer, $player, $showdealer = false) { 

    print "Dealer has: "; 

    if ($showdealer) { 

        foreach ($dealer as $val) 
            print "[{$val['card']}] "; 

        print " (".hand_value($dealer).")"; 

    } else { 

        print "[{$dealer[0]['card']}] [ # ]  (?)"; 

    } 

    print "\nPlayer has: "; 

    foreach ($player as $val)                  
        print "[{$val['card']}] ";         


    print " (".hand_value($player).")"; 

}

function new_hand($dealer, $player) 
    { 
        print "\nDealing a new hand....\n"; 
        $dealer = array(); 
        $player = array(); 
        $dealer[] = draw(); 
        $player[] = draw(); 
        $dealer[] = draw(); 
        $player[] = draw(); 

if ((hand_value($player) == 21) &&  
     (hand_value($dealer) == 21)) { 

    show_cards($dealer, $player, true); 
    print"\n\nBoth Players have BlackJack!\n"; 
    new_hand(&$dealer, &$player); 
    return;     
} 

if (hand_value($player) == 21) { 
    show_cards($dealer, $player, true); 
    print "\n\nPlayer has BlackJack!\n"; 
    new_hand(&$dealer, &$player); 
} else if (hand_value($dealer) == 21) { 
    show_cards($dealer, $player,true); 
    print "\n\nDealer has BlackJack!\n"; 
    new_hand(&$dealer, &$player); 
} else { 
    show_cards($dealer, $player); 
} 
} 


function main() 
{ 
    global $deck;  

    $deck = init(); 
    $command = 'n'; 

	while (TRUE) { 
        switch ($command) { 

            case 'q':             
                print "\n\nThanks for playing!\n"; 
                exit; 
                break; 

	case 's': 
                while (hand_value($dealer) < 16) { 
                    $dealer[] = draw(); 
                } 
                show_cards($dealer, $player, true); 

                if ((hand_value($dealer) > hand_value($player)) && 
                    (hand_value($dealer) <= 21)) { 
                    print "\n\nDealer Wins!\n"; 
                } else if (hand_value($dealer) == hand_value($player)) { 
                    print "\n\nPush Hand.\n"; 
                } else { 
                    print "\n\nPlayer Wins!\n"; 
                } 
                new_hand(&$dealer, &$player); 
                break; 

case 'h': 
                $player[] = draw(); 

                if (hand_value($player) > 21) { 
                    show_cards($dealer, $player, TRUE); 
                    print "\n\nPlayer Busts!\n"; 
                    new_hand(&$dealer, &$player); 
                } else { 
                    show_cards($dealer, $player); 
                } 
                break; 

case 'n': 
                    new_hand(&$dealer, &$player); 
                    break; 

            default: 
                show_cards($dealer, $player); 
        } 

        print "\n> "; 
        $command = getInput(2);         

    } /* end of infinite while */ 
} /* end of main() */ 

?>

        Well, you'd get Undefined Variable notices because you're using $aces and $result without giving them values (in fact, you have a line that initialises $aces to 0 (or, rather, the string "0", but that gets converted to the number 0 later), but you've commented it out.)

        After that, with getInput() undefined, the program dies.

          Ok, i fixed the errors, simply by putting $result = 0, and $aces = 0 at the start of the hand_value function.

          Now what i want to create is a way in which the user can hit, stick or deal a new set of cards, by a form which is a function called getInput(). However, i'm not sure how i can achieve this, i have tried a few ideas, but they just give errors.

          Any ideas?

            Well you inspired me this lunchtime, to write the easiest possible card game. So here it is, PHP-Snap! Probably doesn't help you much though 🙂

            Thinking about it, 1 player Snap is really quite boring 🙂

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