Games
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<?
// This is a fully functional tic-tak-toe game, assuming you have session
// variables installed. Its not clean or pretty, but its one way to do it.
// By the way, the AI for the computer to pick its spot is just a random
// placement, I wrote this game for little kids, if you want to replace the
// alograthim with something complex, that can't be beat, go for it.
// Copyright 2000, Derek Young, at GS Data Design
session_register("tikboard");
session_register("tikplayers");
session_register("tikturn");
session_register("winner");
// This is what happens when they click on start over.
if ($reset) {
unset($tikboard); unset($tikplayers); unset($tikturn); unset($winner);
}
tophtml("Tik-Tak-Toe!");
// replace these lines to insert the X and O image you want.
// example $X="<IMG SRC="http://blabla.com/myimage.gif">";
// it will work just the way it is, just not pretty ;>
$X="<FONT SIZE="10">X</FONT>";
$O="<FONT SIZE="10">O</FONT>";
$BLANK="<FONT SIZE="10"> </FONT>";
function tophtml($title) {
global $PHP_SELF;
echo "<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ";
echo ""http://www.w3c.org/TR/REC-html40/loose.dtd">n";
echo "<HTML>n<HEAD>n<TITLE>$title</TITLE>n</HEAD>n";
echo "<BODY ALINK="0000FF" LINK="0000FF" VLINK="0000FF" ";
echo "BGCOLOR="WHITE">n";
echo "<FORM METHOD="POST" ACTION="" . $PHP_SELF . "">n";
}
function endhtml() {
echo "</FORM></BODY></HTML>n";
}
//If no turn is decided yet, make X first
if(!$tikturn) $tikturn="X";
if(!$tikboard) {
// Initilize Game Board
$tikboard[1]="";
$tikboard[2]="";
$tikboard[3]="";
$tikboard[4]="";
$tikboard[5]="";
$tikboard[6]="";
$tikboard[7]="";
$tikboard[8]="";
$tikboard[9]="";
}
if(!$tikplayers) {
//Initilize Players
echo "How many players?n";
echo "<INPUT TYPE="SUBMIT" NAME="tikplayers" VALUE="One">n";
echo "<INPUT TYPE="SUBMIT" NAME="tikplayers" VALUE="Two">n";
endhtml();
exit();
}
function fill($space) {
global $tikboard;
global $PHP_SELF;
global $winner;
global $X,$O,$BLANK;
if ($tikboard[$space]=="X") return $X;
if ($tikboard[$space]=="O") return $O;
if (!$tikboard[$space])
if ($winner) return $BLANK;
else
return "<A HREF="$PHP_SELF?click=$space">".$BLANK."</A>";
}
// handles where they click
if($click && !$tikboard[$click] && !$winner) {
$tikboard[$click]=$tikturn;
if ($tikturn=="X") $tikturn="O"; else $tikturn="X";
//see if we won.
checkwinner();
if ($tikplayers=="One" && !$winner) {
// Play Computers Turn
srand((double)microtime()*1000000);
$attempt=rand(1,9);
$stopat=$attempt;
while ($attempt++) {
if ($attempt==10) $attempt=1;
if (!$tikboard[$attempt]) { $tikboard[$attempt]=$tikturn;break; }
if ($attempt==$stopat) break;
}
if ($tikturn=="X") $tikturn="O"; else $tikturn="X";
//see if he won.
checkwinner();
}
}
function checkwinner() {
global $winner;
global $tikboard;
if (($tikboard[1]==$tikboard[2]) && ($tikboard[2]==$tikboard[3]))
if($tikboard[1]) { $winner=$tikboard[1]; return; }
if (($tikboard[4]==$tikboard[5]) && ($tikboard[5]==$tikboard[6]))
if($tikboard[4]) { $winner=$tikboard[1]; return; }
if (($tikboard[7]==$tikboard[8]) && ($tikboard[8]==$tikboard[9]))
if($tikboard[7]) { $winner=$tikboard[1]; return; }
if (($tikboard[1]==$tikboard[4]) && ($tikboard[4]==$tikboard[7]))
if($tikboard[1]) { $winner=$tikboard[1]; return; }
if (($tikboard[2]==$tikboard[5]) && ($tikboard[5]==$tikboard[8]))
if($tikboard[2]) { $winner=$tikboard[1]; return; }
if (($tikboard[3]==$tikboard[6]) && ($tikboard[6]==$tikboard[9]))
if($tikboard[3]) { $winner=$tikboard[1]; return; }
if (($tikboard[1]==$tikboard[5]) && ($tikboard[5]==$tikboard[9]))
if($tikboard[1]) { $winner=$tikboard[1]; return; }
if (($tikboard[3]==$tikboard[5]) && ($tikboard[5]==$tikboard[7]))
if($tikboard[3]) { $winner=$tikboard[1]; return; }
}
//Display the board if all goes well
$space=1;
echo "Current Player: " . $tikturn . "<BR><BR>n";
echo "<TABLE BORDER="1" WIDTH="200">n";
echo "<TR ALIGN="CENTER">n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "</TR><TR ALIGN="CENTER">n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "</TR><TR ALIGN="CENTER">n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "<TD WIDTH="33%">".fill($space++)."</TD>n";
echo "</TR>n</TABLE><BR>n";
if ($winner) echo $winner." is the winner!<BR>";
echo "<A HREF="$PHP_SELF?reset=1">Start Over</A>";
endhtml();
?>
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