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104 lines
2.8 KiB
PHP
104 lines
2.8 KiB
PHP
<?php
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/*
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* Tic Tac Toe gnieark's IA
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* For programming challenge https://github.com/jeannedhack/programmingChallenges
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* Gnieark 2015
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* licensed under the Do What the Fuck You Want to Public License http://www.wtfpl.net/
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*/
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function scoreCases($grid,$myChar,$hisChar,$depth=0){
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//list empty cells
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foreach($grid as $key => $cell){
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$tempGrid=$grid;
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$tempGrid[$key]=$myChar;
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if($cell==""){
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//do i win if i play there?
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if(isGridWin($tempGrid)){
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if(fmod($depth,2)==0){
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$scores[$key]=10-$depth;
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}else{
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$scores[$key]=$depth-10;
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}
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}elseif(nbFreeCases($tempGrid)==0){
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$scores[$key]=0;
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}else{
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//find the beast score
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$scores[$key]=0;
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$scoresDeeper=scoreCases($tempGrid,$hisChar,$myChar,$depth+1);
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foreach($scoresDeeper as $scD){
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if(abs($scD)>abs($scores[$key])){
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$scores[$key]=$scD;
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}
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}
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}
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}
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}
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return $scores;
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}
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function nbFreeCases($map){
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$nb=0;
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foreach($map as $cell){
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if ($cell==""){
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$nb++;
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}
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}
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return $nb;
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}
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function isGridWin($map){
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if(
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(($map['0-0']==$map['0-1'])&&($map['0-1']==$map['0-2'])&&($map['0-2']!==""))
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OR (($map['1-0']==$map['1-1'])&&($map['1-1']==$map['1-2'])&&($map['1-2']!==""))
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OR (($map['2-0']==$map['2-1'])&&($map['2-1']==$map['2-2'])&&($map['2-2']!==""))
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OR (($map['0-0']==$map['1-0'])&&($map['1-0']==$map['2-0'])&&($map['2-0']!==""))
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OR (($map['0-1']==$map['1-1'])&&($map['1-1']==$map['2-1'])&&($map['2-1']!==""))
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OR (($map['0-2']==$map['1-2'])&&($map['1-2']==$map['2-2'])&&($map['2-2']!==""))
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OR (($map['0-0']==$map['1-1'])&&($map['1-1']==$map['2-2'])&&($map['2-2']!==""))
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OR (($map['0-2']==$map['1-1'])&&($map['1-1']==$map['2-0'])&&($map['2-0']!==""))
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){
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return true;
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}
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return false;
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}
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$cells=array("0-0","0-1","0-2","1-0","1-1","1-2","2-0","2-1","2-2");
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//filling array
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$emptyCells=array();
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foreach($cells as $cell){
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if (!isset($_GET[$cell])){
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echo "wrong parameters ".$cell; die;
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}
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if($_GET[$cell]==""){
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$emptyCells[]=$cell;
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}else{
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if ($_GET[$cell]!==$_GET['you']){
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$hisChar=$_GET[$cell];
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}
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}
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$map[$cell]=$_GET[$cell];
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}
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if(!isset($_GET['you'])){
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echo "wrong parameters 2"; die;
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}
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if (count($emptyCells)==0){
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echo "error. Grid is full, beach!";
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die;
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}
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if (isGridWin($map)){
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echo ("erreur, i have allready win this tictactoe"); die;
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}
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if(!isset($hisChar)){
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// if opponent char does not exist. (first move) choose one for him.
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if($_GET['you']=="!"){
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$hisChar="?";
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}else{
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$hisChar="!";
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}
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}
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$scoresDesCases=scoreCases($map,htmlentities($_GET['you']),$hisChar);
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$sc=-10000;
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foreach($scoresDesCases as $key=>$cellValue){
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if($cellValue>$sc){
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$sc=$cellValue;
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$beastCase=$key;
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}
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}
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echo $beastCase; |