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< ? php
function tictac_install () {
register_hook ( 'app_menu' , 'addon/tictac/tictac.php' , 'tictac_app_menu' );
}
function tictac_uninstall () {
unregister_hook ( 'app_menu' , 'addon/tictac/tictac.php' , 'tictac_app_menu' );
}
function tictac_app_menu ( $a , & $b ) {
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$b [ 'app_menu' ] .= '<a href="tictac">' . t ( 'Three Dimensional Tic-Tac-Toe' ) . '</a><br />' ;
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}
function tictac_module () {
return ;
}
function tictac_content ( & $a ) {
$o = '' ;
if ( $_POST [ 'move' ]) {
$handicap = $a -> argv [ 1 ];
$mefirst = $a -> argv [ 2 ];
$dimen = $a -> argv [ 3 ];
$yours = $a -> argv [ 4 ];
$mine = $a -> argv [ 5 ];
$yours .= $_POST [ 'move' ];
}
elseif ( $a -> argc > 1 ) {
$handicap = $a -> argv [ 1 ];
$dimen = 3 ;
}
else {
$dimen = 3 ;
}
$o .= '<h3>3D Tic-Tac-Toe</h3><br />' ;
$t = new tictac ( $dimen , $handicap , $mefirst , $yours , $mine );
$o .= $t -> play ();
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$o .= '<a href="tictac">' . t ( 'New game' ) . '</a><br />' ;
$o .= '<a href="tictac/1">' . t ( 'New game with handicap' ) . '</a><br />' ;
$o .= '<p>' . t ( 'Three dimensional tic-tac-toe is just like the traditional game except that it is played on multiple levels simultaneously.' );
$o .= t ( 'In this case there are three levels. You win by getting three in a row on any level, as well as up, down, and diagonally across the different levels.' );
$o .= '</p><p>' ;
$o .= t ( 'The handicap game disables the center position on the middle level because the player claiming this square often has an unfair advantage.' );
$o .= '</p>' ;
return $o ;
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}
class tictac {
private $dimen ;
private $first_move = true ;
private $handicap = 0 ;
private $yours ;
private $mine ;
private $winning_play ;
private $you ;
private $me ;
private $debug = 1 ;
private $crosses = array ( '011' , '101' , '110' , '112' , '121' , '211' );
/*
'001' , '010' , '011' , '012' , '021' ,
'101' , '110' , '111' , '112' , '121' ,
'201' , '210' , '211' , '212' , '221' );
*/
private $corners = array (
'000' , '002' , '020' , '022' ,
'200' , '202' , '220' , '222' );
private $planes = array (
array ( '000' , '001' , '002' , '010' , '011' , '012' , '020' , '021' , '022' ), // horiz 1
array ( '100' , '101' , '102' , '110' , '111' , '112' , '120' , '121' , '122' ), // 2
array ( '200' , '201' , '202' , '210' , '211' , '212' , '220' , '221' , '222' ), // 3
array ( '000' , '010' , '020' , '100' , '110' , '120' , '200' , '210' , '220' ), // vert left
array ( '000' , '001' , '002' , '100' , '101' , '102' , '200' , '201' , '202' ), // vert top
array ( '002' , '012' , '022' , '102' , '112' , '122' , '202' , '212' , '222' ), // vert right
array ( '020' , '021' , '022' , '120' , '121' , '122' , '220' , '221' , '222' ), // vert bot
array ( '010' , '011' , '012' , '110' , '111' , '112' , '210' , '211' , '212' ), // left vertx
array ( '001' , '011' , '021' , '101' , '111' , '221' , '201' , '211' , '221' ), // top vertx
array ( '000' , '001' , '002' , '110' , '111' , '112' , '220' , '221' , '222' ), // diag top
array ( '020' , '021' , '022' , '110' , '111' , '112' , '200' , '201' , '202' ), // diag bot
array ( '000' , '010' , '020' , '101' , '111' , '121' , '202' , '212' , '222' ), // diag left
array ( '002' , '012' , '022' , '101' , '111' , '121' , '200' , '210' , '220' ), // diag right
array ( '002' , '011' , '020' , '102' , '111' , '120' , '202' , '211' , '220' ), // diag x
array ( '000' , '011' , '022' , '100' , '111' , '122' , '200' , '211' , '222' ) // diag x
);
private $winner = array (
array ( '000' , '001' , '002' ), // board 0 winners - left corner across
array ( '000' , '010' , '020' ), // down
array ( '000' , '011' , '022' ), // diag
array ( '001' , '011' , '021' ), // middle-top down
array ( '010' , '011' , '012' ), // middle-left across
array ( '002' , '011' , '020' ), // right-top diag
array ( '002' , '012' , '022' ), // right-top down
array ( '020' , '021' , '022' ), // bottom-left across
array ( '100' , '101' , '102' ), // board 1 winners
array ( '100' , '110' , '120' ),
array ( '100' , '111' , '122' ),
array ( '101' , '111' , '121' ),
array ( '110' , '111' , '112' ),
array ( '102' , '111' , '120' ),
array ( '102' , '112' , '122' ),
array ( '120' , '121' , '122' ),
array ( '200' , '201' , '202' ), // board 2 winners
array ( '200' , '210' , '220' ),
array ( '200' , '211' , '222' ),
array ( '201' , '211' , '221' ),
array ( '210' , '211' , '212' ),
array ( '202' , '211' , '220' ),
array ( '202' , '212' , '222' ),
array ( '220' , '221' , '222' ),
array ( '000' , '100' , '200' ), // top-left corner 3d
array ( '000' , '101' , '202' ),
array ( '000' , '110' , '220' ),
array ( '000' , '111' , '222' ),
array ( '001' , '101' , '201' ), // top-middle 3d
array ( '001' , '111' , '221' ),
array ( '002' , '102' , '202' ), // top-right corner 3d
array ( '002' , '101' , '200' ),
array ( '002' , '112' , '222' ),
array ( '002' , '111' , '220' ),
array ( '010' , '110' , '210' ), // left-middle 3d
array ( '010' , '111' , '212' ),
array ( '011' , '111' , '211' ), // middle-middle 3d
array ( '012' , '112' , '212' ), // right-middle 3d
array ( '012' , '111' , '210' ),
array ( '020' , '120' , '220' ), // bottom-left corner 3d
array ( '020' , '110' , '200' ),
array ( '020' , '121' , '222' ),
array ( '020' , '111' , '202' ),
array ( '021' , '121' , '221' ), // bottom-middle 3d
array ( '021' , '111' , '201' ),
array ( '022' , '122' , '222' ), // bottom-right corner 3d
array ( '022' , '121' , '220' ),
array ( '022' , '112' , '202' ),
array ( '022' , '111' , '200' )
);
function __construct ( $dimen , $handicap , $mefirst , $yours , $mine ) {
$this -> dimen = 3 ;
$this -> handicap = (( $handicap ) ? 1 : 0 );
$this -> mefirst = (( $mefirst ) ? 1 : 0 );
$this -> yours = str_replace ( 'XXX' , '' , $yours );
$this -> mine = $mine ;
$this -> you = $this -> parse_moves ( 'you' );
$this -> me = $this -> parse_moves ( 'me' );
if ( strlen ( $yours ))
$this -> first_move = false ;
}
function play () {
if ( $this -> first_move ) {
if ( rand ( 0 , 1 ) == 1 ) {
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$o .= '<div class="error-message">' . t ( 'You go first...' ) . '</div><br />' ;
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$this -> mefirst = 0 ;
$o .= $this -> draw_board ();
return $o ;
}
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$o .= '<div class="error-message">' . t ( 'I\'m going first this time...' ) . ' </div><br />' ;
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$this -> mefirst = 1 ;
}
if ( $this -> check_youwin ()) {
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$o .= '<div class="error-message">' . t ( 'You won!' ) . '</div><br />' ;
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$o .= $this -> draw_board ();
return $o ;
}
if ( $this -> fullboard ())
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$o .= '<div class="error-message">' . t ( '"Cat" game!' ) . '</div><br />' ;
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$move = $this -> winning_move ();
if ( strlen ( $move )) {
$this -> mine .= $move ;
$this -> me = $this -> parse_moves ( 'me' );
}
else {
$move = $this -> defensive_move ();
if ( strlen ( $move )) {
$this -> mine .= $move ;
$this -> me = $this -> parse_moves ( 'me' );
}
else {
$move = $this -> offensive_move ();
if ( strlen ( $move )) {
$this -> mine .= $move ;
$this -> me = $this -> parse_moves ( 'me' );
}
}
}
if ( $this -> check_iwon ())
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$o .= '<div class="error-message">' . t ( 'I won!' ) . '</div><br />' ;
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if ( $this -> fullboard ())
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$o .= '<div class="error-message">' . t ( '"Cat" game!' ) . '</div><br />' ;
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$o .= $this -> draw_board ();
return $o ;
}
function parse_moves ( $player ) {
if ( $player == 'me' )
$str = $this -> mine ;
if ( $player == 'you' )
$str = $this -> yours ;
$ret = array ();
while ( strlen ( $str )) {
$ret [] = substr ( $str , 0 , 3 );
$str = substr ( $str , 3 );
}
return $ret ;
}
function check_youwin () {
for ( $x = 0 ; $x < count ( $this -> winner ); $x ++ ) {
if ( in_array ( $this -> winner [ $x ][ 0 ], $this -> you ) && in_array ( $this -> winner [ $x ][ 1 ], $this -> you ) && in_array ( $this -> winner [ $x ][ 2 ], $this -> you )) {
$this -> winning_play = $this -> winner [ $x ];
return true ;
}
}
return false ;
}
function check_iwon () {
for ( $x = 0 ; $x < count ( $this -> winner ); $x ++ ) {
if ( in_array ( $this -> winner [ $x ][ 0 ], $this -> me ) && in_array ( $this -> winner [ $x ][ 1 ], $this -> me ) && in_array ( $this -> winner [ $x ][ 2 ], $this -> me )) {
$this -> winning_play = $this -> winner [ $x ];
return true ;
}
}
return false ;
}
function defensive_move () {
for ( $x = 0 ; $x < count ( $this -> winner ); $x ++ ) {
if (( $this -> handicap ) && in_array ( '111' , $this -> winner [ $x ]))
continue ;
if ( in_array ( $this -> winner [ $x ][ 0 ], $this -> you ) && in_array ( $this -> winner [ $x ][ 1 ], $this -> you ) && ( ! in_array ( $this -> winner [ $x ][ 2 ], $this -> me )))
return ( $this -> winner [ $x ][ 2 ]);
if ( in_array ( $this -> winner [ $x ][ 0 ], $this -> you ) && in_array ( $this -> winner [ $x ][ 2 ], $this -> you ) && ( ! in_array ( $this -> winner [ $x ][ 1 ], $this -> me )))
return ( $this -> winner [ $x ][ 1 ]);
if ( in_array ( $this -> winner [ $x ][ 1 ], $this -> you ) && in_array ( $this -> winner [ $x ][ 2 ], $this -> you ) && ( ! in_array ( $this -> winner [ $x ][ 0 ], $this -> me )))
return ( $this -> winner [ $x ][ 0 ]);
}
return '' ;
}
function winning_move () {
for ( $x = 0 ; $x < count ( $this -> winner ); $x ++ ) {
if (( $this -> handicap ) && in_array ( '111' , $this -> winner [ $x ]))
continue ;
if ( in_array ( $this -> winner [ $x ][ 0 ], $this -> me ) && in_array ( $this -> winner [ $x ][ 1 ], $this -> me ) && ( ! in_array ( $this -> winner [ $x ][ 2 ], $this -> you )))
return ( $this -> winner [ $x ][ 2 ]);
if ( in_array ( $this -> winner [ $x ][ 0 ], $this -> me ) && in_array ( $this -> winner [ $x ][ 2 ], $this -> me ) && ( ! in_array ( $this -> winner [ $x ][ 1 ], $this -> you )))
return ( $this -> winner [ $x ][ 1 ]);
if ( in_array ( $this -> winner [ $x ][ 1 ], $this -> me ) && in_array ( $this -> winner [ $x ][ 2 ], $this -> me ) && ( ! in_array ( $this -> winner [ $x ][ 0 ], $this -> you )))
return ( $this -> winner [ $x ][ 0 ]);
}
}
function offensive_move () {
shuffle ( $this -> planes );
shuffle ( $this -> winner );
shuffle ( $this -> corners );
shuffle ( $this -> crosses );
if ( ! count ( $this -> me )) {
if ( $this -> handicap ) {
$p = $this -> uncontested_plane ();
foreach ( $this -> corners as $c )
if (( in_array ( $c , $p ))
&& ( ! $this -> is_yours ( $c )) && ( ! $this -> is_mine ( $c )))
return ( $c );
}
else {
if (( ! $this -> marked_yours ( 1 , 1 , 1 )) && ( ! $this -> marked_mine ( 1 , 1 , 1 )))
return '111' ;
$p = $this -> uncontested_plane ();
foreach ( $this -> crosses as $c )
if (( in_array ( $c , $p ))
&& ( ! $this -> is_yours ( $c )) && ( ! $this -> is_mine ( $c )))
return ( $c );
}
}
if ( $this -> handicap ) {
if ( count ( $this -> me ) >= 1 ) {
if ( count ( $this -> get_corners ( $this -> me )) == 1 ) {
if ( in_array ( $this -> me [ 0 ], $this -> corners )) {
$p = $this -> my_best_plane ();
foreach ( $this -> winner as $w ) {
if (( in_array ( $w [ 0 ], $this -> you ))
|| ( in_array ( $w [ 1 ], $this -> you ))
|| ( in_array ( $w [ 2 ], $this -> you )))
continue ;
if ( in_array ( $w [ 0 ], $this -> corners )
&& in_array ( $w [ 2 ], $this -> corners )
&& in_array ( $w [ 0 ], $p ) && in_array ( $w [ 2 ], $p )) {
if ( $this -> me [ 0 ] == $w [ 0 ])
return ( $w [ 2 ]);
elseif ( $this -> me [ 0 ] == $w [ 2 ])
return ( $w [ 0 ]);
}
}
}
}
else {
$r = $this -> get_corners ( $this -> me );
if ( count ( $r ) > 1 ) {
$w1 = array (); $w2 = array ();
foreach ( $this -> winner as $w ) {
if ( in_array ( '111' , $w ))
continue ;
if (( $r [ 0 ] == $w [ 0 ]) || ( $r [ 0 ] == $w [ 2 ]))
$w1 [] = $w ;
if (( $r [ 1 ] == $w [ 0 ]) || ( $r [ 1 ] == $w [ 2 ]))
$w2 [] = $w ;
}
if ( count ( $w1 ) && count ( $w2 )) {
foreach ( $w1 as $a ) {
foreach ( $w2 as $b ) {
if (( in_array ( $a [ 0 ], $this -> you ))
|| ( in_array ( $a [ 1 ], $this -> you ))
|| ( in_array ( $a [ 2 ], $this -> you ))
|| ( in_array ( $b [ 0 ], $this -> you ))
|| ( in_array ( $b [ 1 ], $this -> you ))
|| ( in_array ( $b [ 2 ], $this -> you )))
continue ;
if (( $a [ 0 ] == $b [ 0 ]) && ! $this -> is_mine ( $a [ 0 ])) {
return $a [ 0 ];
}
elseif (( $a [ 2 ] == $b [ 2 ]) && ! $this -> is_mine ( $a [ 2 ])) {
return $a [ 2 ];
}
}
}
}
}
}
}
}
//&& (count($this->me) == 1) && (count($this->you) == 1)
// && in_array($this->you[0],$this->corners)
// && $this->is_neighbor($this->me[0],$this->you[0])) {
// Yuck. You foiled my plan. Since you obviously aren't playing to win,
// I'll try again. You may keep me busy for a few rounds, but I'm
// gonna' get you eventually.
// $p = $this->uncontested_plane();
// foreach($this->crosses as $c)
// if(in_array($c,$p))
// return($c);
// }
// find all the winners containing my points.
$mywinners = array ();
foreach ( $this -> winner as $w )
foreach ( $this -> me as $m )
if (( in_array ( $m , $w )) && ( ! in_array ( $w , $mywinners )))
$mywinners [] = $w ;
// find all the rules where my points are in the center.
$trythese = array ();
if ( count ( $mywinners )) {
foreach ( $mywinners as $w ) {
foreach ( $this -> me as $m ) {
if (( $m == $w [ 1 ]) && ( $this -> uncontested_winner ( $w ))
&& ( ! in_array ( $w , $trythese )))
$trythese [] = $w ;
}
}
}
$myplanes = array ();
for ( $p = 0 ; $p < count ( $this -> planes ); $p ++ ) {
if ( $this -> handicap && in_array ( '111' , $this -> planes [ $p ]))
continue ;
foreach ( $this -> me as $m )
if (( in_array ( $m , $this -> planes [ $p ]))
&& ( ! in_array ( $this -> planes [ $p ], $myplanes )))
$myplanes [] = $this -> planes [ $p ];
}
shuffle ( $myplanes );
// find all winners which share an endpoint, and which are uncontested
$candidates = array ();
if ( count ( $trythese ) && count ( $myplanes )) {
foreach ( $trythese as $t ) {
foreach ( $this -> winner as $w ) {
if ( ! $this -> uncontested_winner ( $w ))
continue ;
if (( in_array ( $t [ 0 ], $w )) || ( in_array ( $t [ 2 ], $w ))) {
foreach ( $myplanes as $p )
if ( in_array ( $w [ 0 ], $p ) && in_array ( $w [ 1 ], $p ) && in_array ( $w [ 2 ], $p ) && ( $w [ 1 ] != $this -> me [ 0 ]))
if ( ! in_array ( $w , $candidates ))
$candidates [] = $w ;
}
}
}
}
// Find out if we are about to force a win.
// Looking for two winning vectors with a common endpoint
// and where we own the middle of both - we are now going to
// grab the endpoint. The game isn't yet over but we've already won.
if ( count ( $candidates )) {
foreach ( $candidates as $c ) {
if ( in_array ( $c [ 1 ], $this -> me )) {
// return endpoint
foreach ( $trythese as $t )
if ( $t [ 0 ] == $c [ 0 ])
return ( $t [ 0 ]);
elseif ( $t [ 2 ] == $c [ 2 ])
return ( $t [ 2 ]);
}
}
// find opponents planes
$yourplanes = array ();
for ( $p = 0 ; $p < count ( $this -> planes ); $p ++ ) {
if ( $this -> handicap && in_array ( '111' , $this -> planes [ $p ]))
continue ;
if ( in_array ( $this -> you [ 0 ], $this -> planes [ $p ]))
$yourplanes [] = $this -> planes [ $p ];
}
shuffle ( $this -> winner );
foreach ( $candidates as $c ) {
// We now have a list of winning strategy vectors for our second point
// Pick one that will force you into defensive mode.
// Pick a point close to you so we don't risk giving you two
// in a row when you block us. That would force *us* into
// defensive mode.
// We want: or: not:
// X|O| X| | X| |
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// |O| O|O| |O|
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// | | | | |O|
if ( count ( $this -> you ) == 1 ) {
foreach ( $this -> winner as $w ) {
if ( in_array ( $this -> me [ 0 ], $w ) && in_array ( $c [ 1 ], $w )
&& $this -> uncontested_winner ( $w )
&& $this -> is_neighbor ( $this -> you [ 0 ], $c [ 1 ])) {
return ( $c [ 1 ]);
}
}
}
}
// You're somewhere else entirely or have made more than one move
// - any strategy vector which puts you on the defense will have to do
foreach ( $candidates as $c ) {
foreach ( $this -> winner as $w ) {
if ( in_array ( $this -> me [ 0 ], $w ) && in_array ( $c [ 1 ], $w )
&& $this -> uncontested_winner ( $w )) {
return ( $c [ 1 ]);
}
}
}
}
// worst case scenario, no strategy we can play,
// just find an empty space and take it
for ( $x = 0 ; $x < $this -> dimen ; $x ++ )
for ( $y = 0 ; $y < $this -> dimen ; $y ++ )
for ( $z = 0 ; $z < $this -> dimen ; $z ++ )
if (( ! $this -> marked_yours ( $x , $y , $z ))
&& ( ! $this -> marked_mine ( $x , $y , $z ))) {
if ( $this -> handicap && $x == 1 && $y == 1 && $z == 1 )
continue ;
return ( sprintf ( " %d%d%d " , $x , $y , $z ));
}
return '' ;
}
function marked_yours ( $x , $y , $z ) {
$str = sprintf ( " %d%d%d " , $x , $y , $z );
if ( in_array ( $str , $this -> you ))
return true ;
return false ;
}
function marked_mine ( $x , $y , $z ) {
$str = sprintf ( " %d%d%d " , $x , $y , $z );
if ( in_array ( $str , $this -> me ))
return true ;
return false ;
}
function is_yours ( $str ) {
if ( in_array ( $str , $this -> you ))
return true ;
return false ;
}
function is_mine ( $str ) {
if ( in_array ( $str , $this -> me ))
return true ;
return false ;
}
function get_corners ( $a ) {
$total = array ();
if ( count ( $a ))
foreach ( $a as $b )
if ( in_array ( $b , $this -> corners ))
$total [] = $b ;
return $total ;
}
function uncontested_winner ( $w ) {
if ( $this -> handicap && in_array ( '111' , $w ))
return false ;
$contested = false ;
if ( count ( $this -> you )) {
foreach ( $this -> you as $you )
if ( in_array ( $you , $w ))
$contested = true ;
}
return (( $contested ) ? false : true );
}
function is_neighbor ( $p1 , $p2 ) {
list ( $x1 , $y1 , $z1 ) = sscanf ( $p1 , " %1d%1d%1d " );
list ( $x2 , $y2 , $z2 ) = sscanf ( $p2 , " %1d%1d%1d " );
if ((( $x1 == $x2 ) || ( $x1 == $x2 + 1 ) || ( $x1 == $x2 - 1 )) &&
(( $y1 == $y2 ) || ( $y1 == $y2 + 1 ) || ( $y1 == $y2 - 1 )) &&
(( $z1 == $z2 ) || ( $z1 == $z2 + 1 ) || ( $z1 == $z2 - 1 )))
return true ;
return false ;
}
function my_best_plane () {
$second_choice = array ();
shuffle ( $this -> planes );
for ( $p = 0 ; $p < count ( $this -> planes ); $p ++ ) {
$contested = 0 ;
if ( $this -> handicap && in_array ( '111' , $this -> planes [ $p ]))
continue ;
if ( ! in_array ( $this -> me [ 0 ], $this -> planes [ $p ]))
continue ;
foreach ( $this -> you as $m ) {
if ( in_array ( $m , $this -> planes [ $p ]))
$contested ++ ;
}
if ( ! $contested )
return ( $this -> planes [ $p ]);
if ( $contested == 1 )
$second_choice = $this -> planes [ $p ];
}
return $second_choice ;
}
function uncontested_plane () {
$freeplane = true ;
shuffle ( $this -> planes );
$pl = $this -> planes ;
for ( $p = 0 ; $p < count ( $pl ); $p ++ ) {
if ( $this -> handicap && in_array ( '111' , $pl [ $p ]))
continue ;
foreach ( $this -> you as $m ) {
if ( in_array ( $m , $pl [ $p ]))
$freeplane = false ;
}
if ( ! $freeplane ) {
$freeplane = true ;
continue ;
}
if ( $freeplane )
return ( $pl [ $p ]);
}
return array ();
}
function fullboard () {
return false ;
}
function draw_board () {
if ( ! strlen ( $this -> yours ))
$this -> yours = 'XXX' ;
$o .= " <form action= \" tictac/ { $this -> handicap } / { $this -> mefirst } / { $this -> dimen } / { $this -> yours } / { $this -> mine } \" method= \" post \" /> " ;
for ( $x = 0 ; $x < $this -> dimen ; $x ++ ) {
$o .= '<table>' ;
for ( $y = 0 ; $y < $this -> dimen ; $y ++ ) {
$o .= '<tr>' ;
for ( $z = 0 ; $z < $this -> dimen ; $z ++ ) {
$s = sprintf ( " %d%d%d " , $x , $y , $z );
$winner = (( is_array ( $this -> winning_play ) && in_array ( $s , $this -> winning_play )) ? " color: #FF0000; " : " " );
$bordertop = (( $y != 0 ) ? " border-top: 2px solid #000; " : " " );
$borderleft = (( $z != 0 ) ? " border-left: 2px solid #000; " : " " );
if ( $this -> handicap && $x == 1 && $y == 1 && $z == 1 )
$o .= " <td style= \" width: 25px; height: 25px; $bordertop $borderleft\ " align = \ " center \" > </td> " ;
elseif ( $this -> marked_yours ( $x , $y , $z ))
$o .= " <td style= \" width: 25px; height: 25px; $bordertop $borderleft $winner\ " align = \ " center \" >X</td> " ;
elseif ( $this -> marked_mine ( $x , $y , $z ))
$o .= " <td style= \" width: 25px; height: 25px; $bordertop $borderleft $winner\ " align = \ " center \" >O</td> " ;
else {
$val = sprintf ( " %d%d%d " , $x , $y , $z );
$o .= " <td style= \" width: 25px; height: 25px; $bordertop $borderleft\ " align = \ " center \" ><input type= \" checkbox \" name= \" move \" value= \" $val\ " onclick = \ " this.form.submit(); \" /></td> " ;
}
}
$o .= '</tr>' ;
}
$o .= '</table><br />' ;
}
$o .= '</form>' ;
return $o ;
}
}