An algorithm example: PHP implements Happy Xiaoxiaole

This article mainly introduces how PHP implements the happy Xiaoxiaole algorithm that we all know.

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1. Requirement description:
1. In an 8*8 matrix grid Color blocks of 5 colors appear randomly.
2. When three or more color blocks are connected horizontally or vertically, eliminate these color blocks.
3. After the color blocks are eliminated, the upper color blocks move downward, and random color blocks drop down to fill the matrix vacancies.
4. Repeat steps 2 and 3.
5. Eliminating 3 blocks of the same color adds 10 points, 4 adds 15 points, 5 adds 20 points, 6 adds 30 points, 7 adds 40 points, 8 adds 70 points, 9 adds 100 points , 10 points will add 150 points, and each additional one will add 50 points more than the previous one.

2. The above code

<?php
//所有图形初始化数据，key代表位置，value代表颜色
$xxl = array(
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
 array(&#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;, &#39;&#39;),
);
$point = play($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;
 $bu ++;
 echo &#39;=================================开始第&#39;.$bu.&#39;步==================================&#39;;
 $color = array(1 => &#39;red&#39;,2 => &#39;green&#39;,3 => &#39;yellow&#39;,4 => &#39;blue&#39;,5 => &#39;black&#39;);//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 == &#39; &#39;){
    $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 .&#39;-&#39;. $k2] = array($k1, $k2, $v2, $k1 .&#39;-&#39;. $k2 .&#39;-&#39;. $v2);
   }else{
    if($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 .&#39;-&#39;. $k2] = array($k1, $k2, $v2, $k1 .&#39;-&#39;. $k2 .&#39;-&#39;. $v2);
   }


   if($k2 === 0){
    $sam[$now][$k1 .&#39;-&#39;. $k2] = array($k1, $k2, $v2, $k1 .&#39;-&#39;. $k2 .&#39;-&#39;. $v2);
   }else{
    if($v2 != $xxl[$k1][$k2-1]){//同一行上和前一个颜色不一样
     $now++;
    }
    $sam[$now][$k1 .&#39;-&#39;. $k2] = array($k1, $k2, $v2, $k1 .&#39;-&#39;. $k2 .&#39;-&#39;. $v2);
   }
  }
  //获得行上相连色块start
  foreach($sam as $x => $y){
   if(count($y) > 2){
    $key = &#39;R-&#39;.$group;
    foreach($y as $x2 => $y2){
     $y[$x2][&#39;group&#39;][&#39;r&#39;] = $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){
    $key = &#39;L-&#39;.$group;
    foreach($y as $x2 => $y2){
     $y[$x2][&#39;group&#39;][&#39;l&#39;] = $key;
     if(isset($samArr[$x2][&#39;group&#39;][&#39;r&#39;])){//判断本点是否已出现在横向组里
      $samArr[$x2][&#39;group&#39;][&#39;l&#39;] = $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 &#39;=================================消除完毕！==================================&#39;;
  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][$x] = &#39;*&#39;;
   unset($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] = &#39; &#39;;
  }
  $xxl[$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();
 $near[&#39;up&#39;] = ($one[0] - 1).&#39;-&#39;.$one[1];//上面的点
 $near[&#39;down&#39;] = ($one[0] + 1).&#39;-&#39;.$one[1];//下面的点
 $near[&#39;left&#39;] = $one[0].&#39;-&#39;.($one[1] - 1);//左面的点
 $near[&#39;right&#39;] = $one[0].&#39;-&#39;.($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[&#39;group&#39;], $xxl[$v][&#39;group&#39;]);
   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
 $str = &#39;&#39;;
 foreach($arr as $v){
  foreach($v as $v2){
   $str .= &#39; &#39;.$v2;
  }
  $str .= "\n";
 }
 echo "\n".$str;
}

The running results are as follows:

12345 represents 5 colors respectively.

=================================开始第1步==================================
 3 3 2 2 1 1 1 4
 4 3 4 3 4 1 1 3
 3 1 4 1 1 4 1 2
 2 3 4 3 1 2 4 4
 4 2 4 2 2 2 1 4
 3 3 2 1 2 3 1 1
 5 2 1 3 2 1 4 5
 3 4 5 1 3 2 3 3

 3 3 2 2 * * * 4
 4 3 * 3 4 1 * 3
 3 1 * 1 1 4 * 2
 2 3 * 3 1 2 4 4
 4 2 * * * * 1 4
 3 3 2 1 * 3 1 1
 5 2 1 3 * 1 4 5
 3 4 5 1 3 2 3 3

 3 3   4
 4 3 2  3
 3 1 3 1 2
 2 3 1 4 4 4
 4 2 2 3 4 2 1 4
 3 3 2 1 1 3 1 1
 5 2 1 3 1 1 4 5
 3 4 5 1 3 2 3 3
本次消除获得积分数量：55
=================================开始第2步==================================
 3 3 2 2 3 3 2 4
 4 3 3 2 1 3 3 3
 3 1 3 3 4 1 4 2
 2 3 5 1 2 4 4 4
 4 2 2 3 4 2 1 4
 3 3 2 1 1 3 1 1
 5 2 1 3 1 1 4 5
 3 4 5 1 3 2 3 3

 3 3 2 2 3 3 2 4
 4 3 3 2 1 * * *
 3 1 3 3 4 1 4 2
 2 3 5 1 2 * * *
 4 2 2 3 4 2 1 4
 3 3 2 1 1 3 1 1
 5 2 1 3 1 1 4 5
 3 4 5 1 3 2 3 3

 3 3 2 2 3
 4 3 3 2 1
 3 1 3 3 4 3 2 4
 2 3 5 1 2 1 4 2
 4 2 2 3 4 2 1 4
 3 3 2 1 1 3 1 1
 5 2 1 3 1 1 4 5
 3 4 5 1 3 2 3 3
本次消除获得积分数量：20
=================================开始第3步==================================
 3 3 2 2 3 4 1 3
 4 3 3 2 1 4 2 5
 3 1 3 3 4 3 2 4
 2 3 5 1 2 1 4 2
 4 2 2 3 4 2 1 4
 3 3 2 1 1 3 1 1
 5 2 1 3 1 1 4 5
 3 4 5 1 3 2 3 3
=================================消除完毕！==================================
共获得积分数量：75

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