A little ARRAY help please

**gregs** · Sep 30, 2005 12:28

You can see this working at:
http://wynnesports.com/tictactoe

When I click an underscore _, it deletes all the previous clicks?
Can someone help me with why it won't remember the $boards array?
Do I somehow need to pass it when I click this?

PHP Code:


ECHO "<TT><a href=\"gamescreen.php?prow=$row&pcol=$col&choice=1&turn=$turn\">-</a>" . "&nbsp;</TT>";

Here is the entirety of the code

PHP Code:


<html>
<head>
<title>3D Boards</title>
</head>
<body>
<?PHP
 
$player[1]=0;
$player[2]=0;
if ( empty($_REQUEST['turn']) ? $turn=1 : $turn=($_REQUEST['turn']) );
if ( empty($_REQUEST['choice']) ? $choice=0 : $choice=($_REQUEST['choice']) );
if ($choice==1)
{
$board[$prow][$pcol]=$turn;
$choice=0;
if (( $turn == 1 ) ? $turn=2 : $turn=1);
}
echo "Your Turn, Player " . $turn . "<br /><br />\n";
 
FOR ($row=1; $row<17; $row++)
{
IF ($row==5){ECHO "<BR>\n";}
IF ($row==9){ECHO "<BR>\n";}
IF ($row==13){ECHO "<BR>\n";}
    FOR ($col=1; $col<5; $col++)
    {
     IF ($board[$row][$col]==1)
     {
        ECHO "<TT>X" . "&nbsp;</TT>";
     }
     ELSE IF ($board[$row][$col]==2)
     {
        ECHO "<TT>O" . "&nbsp;</TT>";
     }
     ELSE
     {
        ECHO "<TT><a href=\"gamescreen.php?prow=$row&pcol=$col&choice=1&turn=$turn\">-</a>" . "&nbsp;</TT>";
     }
    }
    ECHO "<BR />\n";
}
echo "<br />\n";
echo "<TT>Player X: " . $player[1] . "</TT><br />\n";
echo "<TT>Player O: " . $player[2] . "</TT>\n";
?>
</body>
</html>

**Webnet** · Sep 30, 2005 13:02

Because all your variables are stored in the URL and everytime someone clicks on something it changes.

**gregs** · Sep 30, 2005 13:07

Originally Posted by Webnet

Because all your variables are stored in the URL and everytime someone clicks on something it changes.

How do I pass $boards within the URL then?

**REMIYA** · Sep 30, 2005 19:09

There is only one solution. Serialize the array, convert it to text and pass it through the URL.
Then unserialize it back and reconstruct the board.
Hope this helps

**REMIYA** · Sep 30, 2005 19:15

But with a simple JavaScript you may post it through the POST method.

**Webnet** · Sep 30, 2005 20:25

There are multiple options, you could store all the information on past clicks for x/o in an array and store it in each user's session. OR you could serialize it and use $_GET or $_POST. $_POST requires an information resubmit every time the page refreshes. $_GET allows the information to be modifiable in the URL.

$_SESSION is your best route.

**spikeZ** · Oct 1, 2005 06:31

Building on webnut's theory about using sessions to store the data....
Heres something I put together for you.

(commented as much as possible!)

PHP Code:


<?php # tic-tac-toe

// start a session to store the variables and array

session_start();

// restart the game by destroying the session

if(isset($_GET['restart'])) {

session_destroy();

}

// define players

$player_1 = 'X';

$player_2 = 'O';

if($_GET['player'] == 'X') { $player = $player_2; } else { $player = $player_1; }

echo "Your Turn, Player " . $player . "<br /><br />\n";

// define the board. This could be done in a loop.....

// check that the session count is not 1 ie: the game hasn't been started

if($_SESSION['count'] != 1) {

// setup array

$_SESSION['board'] = array(

"0"=>"[ * ]", "1"=>"[ * ]","2"=>"[ * ]","3"=>"[ * ]","4"=>"[ * ]","5"=>"[ * ]","6"=>"[ * ]","7"=>"[ * ]",

"8"=>"[ * ]","9"=>"[ * ]","10"=>"[ * ]","11"=>"[ * ]","12"=>"[ * ]","13"=>"[ * ]","14"=>"[ * ]","15"=>"[ * ]");

}

// if a turn has been made

if(isset($_GET['id'])) {

// set the session key corresponding to the passed id is set as the players character

$_SESSION['board'][$_GET['id']] = '[ ' . $player . ' ]';

// set the session counter to 1 to signify the game has begun

$_SESSION['count']=1;

} 

?>

<style type="text/css">

a:link {

color: #000000;

text-decoration: none;

}

a:hover {

color: #FF0000;

text-decoration: none;

}

a:active {

color: #000000;

text-decoration: none;

}

</style>

<h2>Tic-Tac-toe!</h2>

<?php

// display board

foreach($_SESSION['board'] as $key=>$data) {

// if the key is divisible by 4, echo a <br>

if(($key%4) == 0) { echo '<br>';}

// if the data is equal to either X or O, dont offer a link

if($data == '[ X ]') { echo '[ X ]'; 

} elseif($data == '[ O ]') { echo '[ O ]'; } else  

 {

 // else offer a link to click

echo '<a href="?player='.$player . '&id='.$key.'">'. $data . '</a>';

    }

} 

?>

<p><a href="?restart">restart</a></p>

You can extend it further by setting up an function to check if the rows/ columns add up to 4 of the same characters.

Hope this helps, let me know!

Cheers

Mike

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