| Current File : //opt/RZphp74/includes/doc/Games_Chess/examples/HTMLChess.php |
<?php
require_once 'Games/Chess/Standard.php';
require_once 'Games/Chess/Losers.php';
require_once 'Games/Chess/Crazyhouse.php';
if (!version_compare(phpversion(), '4.2.0', '>=')) {
die('Requires PHP version 4.2.0 or greater');
}
// hack control
if (!isset($_GET['start']) || !is_string($_GET['start'])) {
$_GET['start'] = '';
}
if (strlen($_GET['start']) != 2) {
$_GET['start'] = '';
} elseif ($_GET['start'] != '' && !preg_match('/[a-h][1-8]/', $_GET['start'])) {
$_GET['start'] = '';
}
if (!isset($_GET['goto']) || !is_string($_GET['goto'])) {
$_GET['goto'] = '';
} elseif (strlen($_GET['goto']) != 2) {
$_GET['goto'] = '';
} elseif (!preg_match('/[a-h][1-8]/', $_GET['goto'])) {
$_GET['goto'] = '';
}
if (!empty($_GET['promote']) && !in_array($_GET['promote'], array('Q', 'R',
'N', 'B'))) {
$_GET['promote'] = 'Q';
}
/**
* Creates the game and maintains persistence through sessions
* Call this at the top of the webpage
* @param string name of the session containing the current game
* @param string name of the game variable (a {@link visualboard} class)
*/
function setup_game($session_id, $gamename)
{
session_name($session_id);
session_start();
if (isset($_GET['newgame'])) {
session_destroy();
}
session_name($session_id);
session_register($gamename);
}
/**
* The primary class - declare one of these at the top of the file
*
* Do it like this:
*
* <code>
* setup_game('mygame','x');
* $x = $_SESSION['x'];
* if (!isset($x)) $x = new visualboard;
* </code>
* @author Greg Beaver <cellog@users.sourceforge.net>
* @copyright Copyright 2002, Greg Beaver
* @version 1.0
*/
class visualboard
{
/**
* The logical board
* @var Games_Chess
*/
var $_board;
/**
* Promotion contents
* @var false|array
*/
var $promote = false;
/**
* Game type (Standard, Losers, Crazyhouse)
* @var string
*/
var $_type;
/**
* Initializes {@link $moves, $board}
*/
function visualboard($fen = false, $type = 'Standard')
{
$board = 'Games_Chess_' . $type;
$this->_board = new $board;
$this->_type = $type;
$err = $this->_board->resetGame($fen);
if ($this->_board->isError($err)) {
echo '<b>' .$err->getMessage() . '</b><br />';
$this->_board->resetGame();
}
}
/**
* Prints javascript for the function addmove:
* {@source}
*/
function javascript()
{?>
<script language="JavaScript" type="text/javascript">
<!--
function addMove(move, piece)
{
if (document.forms[0].start.value == '')
{
document.forms[0].start.value = move;
switch (piece)
{
case "P" :
case "Q" :
case "R" :
case "B" :
case "N" :
case "K" :
break;
default :
piece = null;
break;
}
document.forms[0].startpiece.value = piece;
} else
{
if (document.forms[0]["goto"].value == '')
{
document.forms[0]["goto"].value = move;
first = document.forms[0].startpiece.value;
if (first) {
if (first == "P") {
first = "";
if (piece) {
first = document.forms[0].start.value.charAt(0) + "x";
}
} else {
if (piece) {
first += "x";
}
}
}
if (confirm("Do this move? (" + first + move + ")"))
{
document.forms[0].submit();
} else {
document.forms[0].start.value = '';
document.forms[0].startpiece.values = '';
document.forms[0]["goto"].value = '';
document.forms[0].SAN.value = '';
}
}
}
}
function doPlacement(piece)
{
switch (piece) {
case "P" :
name = "Pawn";
break;
case "Q" :
name = "Queen";
break;
case "R" :
name = "Rook";
break;
case "B" :
name = "Bishop";
break;
case "N" :
name = "Knight";
break;
}
square = prompt("Where should the " + name + " be placed (a1-h8, a1 is lower left)?", "e4");
if (square) {
document.forms[0].SAN.value = piece + "@" + square;
document.forms[0].start.value = "";
document.forms[0]["goto"].value = "";
if (square.charAt(1) == "1" || square.charAt(1) == "8") {
document.forms[0].SAN.value = '';
document.forms[0].start.value = "";
document.forms[0]["goto"].value = "";
alert("Cannot place a pawn on the first or last rank");
} else {
document.forms[0].submit();
}
}
}
//-->
</script>
<?php
}
function doCaptured($captured)
{
$imagepath = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'images';
echo '<table border="1">';
// echo '<tr><td> </td><td colspan="2">White</td><td colspan="2">Black</td></tr>';
foreach ($captured['W'] as $piece => $number) {
echo '<tr><td>';
if (file_exists($imagepath . '/' . $piece . '.gif')) {
$image = $piece . '.gif';
$imgsize = GetImageSize($imagepath . DIRECTORY_SEPARATOR . $image);
$click = ($this->_board->toMove() == 'W' && $number) ?
'<a href="#" onclick="doPlacement(\'' . $piece . '\')">' :
'';
echo $click . '<img src="images/' . $image . '" border="0" width="' . $imgsize[0] .
'" height="' . $imgsize[1] . '" alt="'. $piece . '">';
echo ($click ? '</a>' : '');
} else {
echo $piece;
}
echo '</td><td>' . $number . '</td>';
$number = $captured['B'][$piece];
echo '<td>';
if (file_exists($imagepath . '/' . $piece . '.gif')) {
$image = 'dark/' . $piece . '.gif';
$imgsize = GetImageSize($imagepath . DIRECTORY_SEPARATOR . $image);
$click = ($this->_board->toMove() == 'B' && $number) ?
'<a href="#" onclick="doPlacement(\'' . $piece . '\')">' :
'';
echo $click . '<img src="images/' . $image . '" border="0" width="' . $imgsize[0] .
'" height="' . $imgsize[1] . '" alt="'. $piece . '">';
echo ($click ? '</a>' : '');
} else {
echo $piece;
}
echo '</td><td>' . $number . '</td></tr>';
}
echo '</table>';
}
/**
* Grabs the next move from form variables start, goto, kingcastle and queencastle
*
* If $_GET['start'] is not used, it checks for $_GET['kingcastle'] and tries
* to castle kingside if found. Otherwise, it looks for $_GET['queencastle']
* and tries to castle queenside
*/
function domove()
{
if (!empty($_GET['from']) && !empty($_GET['to']) && !empty($_GET['promote'])) {
$err = $this->_board->moveSquare($_GET['from'], $_GET['to'],
$_GET['promote']);
if ($this->_board->isError($err)) {
echo '<b>' .$err->getMessage() . '</b><br />';
}
$this->promote = false;
return;
}
if (!empty($_GET['SAN'])) {
$err = $this->_board->moveSAN($_GET['SAN']);
if ($this->_board->isError($err)) {
echo '<b>' .$err->getMessage() . '</b><br />';
}
return;
}
if (!empty($_GET['start']) && !empty($_GET['goto'])) {
if ($this->_board->isPromoteMove($_GET['start'], $_GET['goto'])) {
$this->promote = array($_GET['start'], $_GET['goto']);
return;
} else {
$this->promote = false;
}
$err = $this->_board->moveSquare($_GET['start'], $_GET['goto']);
if ($this->_board->isError($err)) {
echo '<b>' .$err->getMessage() . '</b><br />';
}
} elseif (isset($_GET['kingcastle'])) {
$err = $this->_board->moveSAN('O-O');
if ($this->_board->isError($err)) {
echo '<b>' .$err->getMessage() . '</b><br />';
}
} elseif (isset($_GET['queencastle'])) {
$err = $this->_board->moveSAN('O-O-O');
if ($this->_board->isError($err)) {
echo '<b>' .$err->getMessage() . '</b><br />';
}
}
}
/**
* This function prints the javascript that will ask the user what to promote the pawn to
*
* Using the alert() function, this method asks the user if they want a queen.
* If they click Cancel, it asks if they want a rook, then knight, then
* bishop. If they cancel on bishop, it promotes to queen
* to avoid any illogical possibilities
*/
function dopromote()
{
?>
<form action="<?php echo $_SERVER['PHP_SELF'].'?'.session_name().'='.session_id() ?>" name="chess" id="chess">
<input type="hidden" name="promote" value=""><input type="hidden" name="from" value="">
<input type="hidden" name="to" value="">
<input type="submit" name="newmove" value="New move"></form>
<script language="JavaScript" type="text/javascript">
<!--
function promote(from, to)
{
document.forms[0].from.value = from;
document.forms[0].to.value = to;
if (confirm("promote to Queen?"))
{
document.forms[0].promote.value = 'Q';
document.forms[0].submit();
} else
{
if (confirm("promote to Rook?"))
{
document.forms[0].promote.value = 'R';
document.forms[0].submit();
} else
{
if (confirm("promote to Knight?"))
{
document.forms[0].promote.value = 'N';
document.forms[0].submit();
} else
{
if (confirm("promote to Bishop?"))
{
document.forms[0].promote.value = 'B';
document.forms[0].submit();
} else
{
document.forms[0].promote.value = 'Q';
document.forms[0].submit();
}
}
}
}
}
promote('<?php print $this->promote[0] . "', '" . $this->promote[1]; ?>');
//-->
</script>
<?php
}
/**
* Print out the chess game in its entirety: the board, move list and control buttons
*
* first, it checks for a pawn promotion and adds the promote move to {@link $moves} using
* {@link game::addpromote()}. Then it moves the next piece by calling {@link domove()}.
* Then it checks for stalemate and checkmate, and stops the gameplay if either condition is met.
* It creates a visual representation of the board using {@link abstractboard::createrows()}, and
* displays the chessboard by linking together the display of each row on the chessboard using
* {@link row::draw()}, and finally the movelist using {@link game::draw()}
*/
function draw()
{
$this->domove();
if ($this->promote)
{
return $this->dopromote();
}
$board = $this->_board->toArray();
if ($this->_type == 'Crazyhouse') {
$captured = $board['captured'];
$board = $board['board'];
}
$checkmate = $this->_board->inCheckmate();
$fen = $this->_board->renderFen();
$colors = array('#999933', '#FFFFFF');
$textcolors = array('#FFFFFF', '#000000');
$cycle = 0;
if (!$checkmate) $this->javascript();
echo '<table border="1">';
$imagepath = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'images';
foreach($board as $square => $piece) {
if ($square{0} == 'a') {
echo '<tr>';
$cycle = ($cycle + 1) % 2;
}
echo '<td width="30" bgcolor="' .$colors[$cycle]. '"><font color="' .$textcolors[$cycle]. '">';
$upperpiece = $piece ? strtoupper($piece) : false;
echo "<a href=\"#\" onClick=\"addMove('$square', '$upperpiece');return false;" .
"\" id=\"$square\">";
if ($piece) {
if (file_exists($imagepath . '/' . strtoupper($piece) . '.gif')) {
if ($piece != strtoupper($piece)) {
$image = 'dark/' . $piece . '.gif';
} else {
$image = $piece . '.gif';
}
$imgsize = GetImageSize($imagepath . DIRECTORY_SEPARATOR . $image);
echo '<img src="images/' . $image . '" border="0" width="' . $imgsize[0] .
'" height="' . $imgsize[1] . '" alt="'. $piece . '">';
} else {
echo $piece;
}
} else {
if (file_exists($imagepath . '/blank.gif')) {
if ($this->_board->getDiagonalColor($square) == 'W') {
$image = 'blank.gif';
} else {
$image = 'dark/blank.gif';
}
$imgsize = GetImageSize($imagepath . DIRECTORY_SEPARATOR . $image);
echo '<img src="images/' . $image . '" border="0" width="' . $imgsize[0] .
'" height="' . $imgsize[1] . '" alt="'. $piece . '">';
} else {
echo ' ';
}
}
echo '</a>';
echo '</font></td>';
if ($square{0} == 'h') {
echo '</tr>';
}
$cycle = ($cycle + 1) % 2;
}
echo '</table>';
$side = $this->_board->toMove() == 'W' ? 'White' : 'Black';
$gameOver = $this->_board->gameOver();
if ($gameOver) {
$winner = $gameOver == 'W' ? 'White' : 'Black';
if ($stalemate = $this->_board->inStalemate())
{
print "<h1>STALEMATE</h1>";
} elseif ($draw = $this->_board->inDraw())
{
print "<h1>DRAW</h1>";
} elseif ($this->_board->inCheckmate()) {
if (!is_a($this->_board, 'games_chess_standard')) {
$winner = $side;
} else {
$winner = ($side == 'White') ? 'Black' : 'White';
}
print "<h1>CHECKMATE! $winner WINS!</h1>";
} else {
print "<h1>$winner WINS!</h1>";
}
}
?><form action="<?php echo $_SERVER['PHP_SELF'].'?'.session_name().'='.session_id() ?>" name="chess" id="chess">
<?php if (!$gameOver) { echo "<b>{$side} to move</b><br>";
if (isset($captured)) {
echo "<b>Crazyhouse captured pieces available for placement:</b><br>";
$this->doCaptured($captured);
}
?><input type="hidden" value="" name="startpiece">
from <input type="text" name="start" size="2" maxlength="2"> to <input type="text" name="goto" size="2" maxlength="2">
<input type="submit" name="newmove" value="New move"><br>
(alternate) SAN move: <input type="text" name="SAN" size="5"><br>
Reset with new FEN: <input type="text" name="FEN" size="70"><br>
<br><input type="reset"><br>
<?php $this->castlebutton(); } ?><br><br>
<input type="submit" name="newgame" value="New Game"><input type="submit" name="newlosergame" value="New Losers Game"><input type="submit" name="newcrazyhousegame" value="New Crazyhouse Game"></form><?php if (!$gameOver) { ?>
for a friend to join, click here <a href="mailto:example@example.com?Subject=Join my chess game!&Body=<?php
echo htmlentities("go to <a href=\"http://" . $_SERVER['SERVER_NAME'] . $_SERVER['PHP_SELF'] .
"?mygame=".session_id()."\">Here</a> to play me in chess! http://$_SERVER[SERVER_NAME]$_SERVER[PHP_SELF]?mygame=" .
session_id()); ?>">Email my friend</a>
<form action="<?php echo $_SERVER['PHP_SELF'].'?'.session_name().'='.session_id() ?>">
<input type="submit" value="Check to see if opponent has moved"></form>
<?php }
echo "<blockquote>Current position FEN: <strong>$fen</strong></blockquote>";
$moves = $this->_board->getMoveList(true);
echo '<table border="1"><th colspan="3" align="center">Moves</th><tr>' .
'<td>#</td><td>White</td><td>Black</td></tr>';
foreach($moves as $num => $moveset) {
echo '<tr>';
echo "<td>$num</td>";
if (isset($moveset[0])) {
echo "<td>$moveset[0]</td>";
} else {
echo "<td> </td>";
}
if (isset($moveset[1])) {
echo "<td>$moveset[1]</td>";
}
echo '</tr>';
}
echo '</table>';
}
/**
* Prints the castling buttons after checking castling rights
*
* If castling rights have been taken away by a king or rook move, the button is not displayed. This function
* uses {@link Games_Chess::canCastleKingside(), Games_Chess::canCastleQueenside()} to find out.
*/
function castlebutton()
{
if ($this->_board->canCastleKingside())
echo '<input type="submit" name="kingcastle" value="Castle Your King Kingside">';
if ($this->_board->canCastleQueenside())
echo '<input type="submit" name="queencastle" value="Castle Your King Queenside">';
}
}
setup_game('mygame','x');
$x = $_SESSION['x'];
$fen = isset($_GET['FEN']) ? $_GET['FEN'] : false;
if (!isset($x) || isset($_GET['newgame']) || $fen
|| isset($_GET['newlosergame']) || isset($_GET['newcrazyhousegame'])) {
if (isset($_GET['newcrazyhousegame'])) {
$x = new visualboard($fen, 'Crazyhouse');
} elseif (isset($_GET['newlosergame'])) {
$x = new visualboard($fen, 'Losers');
} else {
$x = new visualboard($fen, 'Standard');
}
}
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>PHP Chess!</title>
</head>
<body>
<h1>Welcome to <a href="http://www.chiaraquartet.net">The Chiara Quartet's</a> PHP Chess</h1>
<?php
$x->draw();
$_SESSION['x'] = $x;
?>
</body>
</html>