利用PHP实现开心消消乐的算法示例

<?php
//所有图形初始化数据，key代表位置，value代表颜色
$xxl = array(
 array('', '', '', '', '', '', '', ''),
 array('', '', '', '', '', '', '', ''),
 array('', '', '', '', '', '', '', ''),
 array('', '', '', '', '', '', '', ''),
 array('', '', '', '', '', '', '', ''),
 array('', '', '', '', '', '', '', ''),
 array('', '', '', '', '', '', '', ''),
 array('', '', '', '', '', '', '', ''),
);
$point = play($xxl, $point);//开始游戏
echo "\n共获得积分数量：{$point}";

/*开始消除
 *$xxl  array 所有图形集合
 *$point int  获得积分数量
*/
$bu = 0;
function play($xxl, $point){
 global $bu;
 $bu ++;
 echo '=================================开始第'.$bu.'步==================================';
 $color = array(1 => 'red',2 => 'green',3 => 'yellow',4 => 'blue',5 => 'black');//代表5种颜色
 $samCol = array();//列上相连色块集合
 $nowCol = array();//列上相连色块指针
 $samArr = array();//相连色块总集合
 $group = 1;//组指针

 //随机填充颜色，并获得行上相连色块start
 foreach($xxl as $k1 => $v1){
  $sam = array();//行上相连色块集合
  $now = 1;//行上相连色块指针
  foreach($v1 as $k2 => $v2){
   if(empty($v2) || $v2 == ' '){
    $v2 = $xxl[$k1][$k2] = array_rand($color);//随机填充颜色
   }
   if(!isset($nowCol[$k2])){
    $nowCol[$k2] = 1;
   }
   if($k1 === 0){
    $samCol[$k2][$nowCol[$k2]][$k1 .'-'. $k2] = array($k1, $k2, $v2, $k1 .'-'. $k2 .'-'. $v2);
   }else{
    if($v2 != $xxl[$k1-1][$k2]){//同一列上和前一个颜色不一样
     $nowCol[$k2] ++;
    }
    $samCol[$k2][$nowCol[$k2]][$k1 .'-'. $k2] = array($k1, $k2, $v2, $k1 .'-'. $k2 .'-'. $v2);
   }


   if($k2 === 0){
    $sam[$now][$k1 .'-'. $k2] = array($k1, $k2, $v2, $k1 .'-'. $k2 .'-'. $v2);
   }else{
    if($v2 != $xxl[$k1][$k2-1]){//同一行上和前一个颜色不一样
     $now++;
    }
    $sam[$now][$k1 .'-'. $k2] = array($k1, $k2, $v2, $k1 .'-'. $k2 .'-'. $v2);
   }
  }
  //获得行上相连色块start
  foreach($sam as $x => $y){
   if(count($y) > 2){
    $key = 'R-'.$group;
    foreach($y as $x2 => $y2){
     $y[$x2]['group']['r'] = $key;
    }
    $samArr += $y;
    $group ++;
   }
  }
  //获得行上相连色块end
 }
 //随机填充颜色，并获得行上相连色块end

 //获得列上相连色块start
 $group = 1;
 foreach($samCol as $k => $v){
  foreach($v as $x => $y){
   if(count($y) > 2){
    $key = 'L-'.$group;
    foreach($y as $x2 => $y2){
     $y[$x2]['group']['l'] = $key;
     if(isset($samArr[$x2]['group']['r'])){//判断本点是否已出现在横向组里
      $samArr[$x2]['group']['l'] = $key;
     }
    }
    $samArr += $y;
    $group ++;
   }
  }
 }
 //获得列上相连色块end

 //查找相连色块start
 $res = array();//相连色块集合
 $hasRes = array();
 foreach($samArr as $k => $v){
  if(isset($hasRes[$k])){
   continue;
  }
  $arr = array();
  seek($samArr, $v, $arr);
  $res[] = array_keys($arr);
  $hasRes += $arr;
 }
 //查找相连色块end
 show($xxl);//打印消除前的图形
 if(empty($res)){//如果没有相连色块则退出递归
  echo '=================================消除完毕！==================================';
  return $point;
 }
 $thisPoint = countPoint($res);//计算本次消除获得积分
 $point += $thisPoint;//累计到总积分

 //消除相连色块start
 $next = $xxl;
 foreach($res as $k => $v){
  foreach($v as $k2 => $v2){
   $y = $samArr[$v2][0];
   $x = $samArr[$v2][1];
   $xxl[$y][$x] = '*';
   unset($next[$y][$x]);
  }
 }
 //消除相连色块end

 show($xxl);//打印消除时的图形
 $next = step($next);
 show($next);//打印消除后的图形
 echo "本次消除获得积分数量：{$thisPoint}\n";
 return play($next, $point);
}

/*计算获得积分数量
 *$xxl  array 相连色块集合
 */
function countPoint($xxl){
 //初始化积分配置start
 $config = array(3 => 10, 4 => 15, 5 => 20, 6 => 30, 7 => 40, 8 => 70, 9 => 100);
 for($i = 10; $i <= 64; $i++){
  $config[$i] = 100 + ($i - 9) * 50;
 }
 //初始化积分配置end
 $point = 0;
 foreach($xxl as $v){
  $key = count($v);
  $point += $config[$key];
 }
 return $point;
}

/*消掉并左移
 *$xxl  array 所有图形集合
 */
function step($xxl){
 foreach($xxl as $k => $v){
  $temp = array_merge($v);
  $count = count($temp);
  if($count == 8){
   continue;
  }
  for($i = $count; $i <= 7; $i++){
   $temp[$i] = ' ';
  }
  $xxl[$k] = $temp;
 }
 return $xxl;
}

/*找相邻点
 *$xxl  array 相连图形集合
 *$one   array 某一个点
 *$arr   array 图形集合里的相邻的点
*/
function seek($xxl, $one, &$arr){
// global $i;
 $near = array();
 $near['up'] = ($one[0] - 1).'-'.$one[1];//上面的点
 $near['down'] = ($one[0] + 1).'-'.$one[1];//下面的点
 $near['left'] = $one[0].'-'.($one[1] - 1);//左面的点
 $near['right'] = $one[0].'-'.($one[1] + 1);//右面的点
 foreach($near as $v){
  if(isset($xxl[$v]) && $xxl[$v][2] == $one[2]){//找到相邻点
   $xj = array_intersect($one['group'], $xxl[$v]['group']);
   if(empty($xj)){//如果相邻的点不是本组的就跳过
    continue;
   }
   if(isset($arr[$v])){//如果该点已被遍历过则跳过
    continue;
   }
   $arr[$v] = $xxl[$v];
   seek($xxl, $xxl[$v], $arr);//继续找相邻的点
  }
 }
}

/*打印图形
 *$xxl  array 所有图形集合
 */
function show($xxl){
 //顺时针旋转矩阵start
 $arr = array();
 foreach($xxl as $k => $v){
  foreach($v as $k2 => $v2){
   $arr[7-$k2][$k] = $v2;
  }
 }
 ksort($arr);
 //顺时针旋转矩阵end
 $str = '';
 foreach($arr as $v){
  foreach($v as $v2){
   $str .= ' '.$v2;
  }
  $str .= "\n";
 }
 echo "\n".$str;
}