Question

我正在使用PHP和MySQL 目前我有这样的数据库结构

EventID | MatchName | Tournament | Results
1234    |  match1   | Tour1      | 1-0
5678    |  match2   | Tour2      | 0-1
7890    |  match3   | Tour1      | 1-2

我需要通过锦标赛对它们进行分组，然后像这样获得每个锦标赛记录

<thead>
   <th>Tour1</th>
</thead>
<tr>
   <td>1234</td><td>match1</td><td>Tour1</td><td>1-0</td>
   <td>7890</td><td>match3</td><td>Tour1</td><td>1-2</td>
</tr>

<thead>
   <th>Tour2</th>
</thead>
<tr>
   <td>5678</td><td>match2</td><td>Tour2</td><td>0-1</td>
</tr>

Answer 1

我知道有更简单的方法可以做到你想要的，但是，使用以下库你可以做到你想要的更多：

FunctionalPHP

在以下示例中，您将看到如何执行此操作：

use FunctionalPHP\common\Object;
use FunctionalPHP\common\functional\Collectors;
use FunctionalPHP\iterable\collection\lists\ArrayList;

class Event extends Object {

   protected $eventId;
   protected $matchName;
   protected $tournament;
   protected $results;

   public function __construct (int $eventId, string $matchName
                               ,string $tournament, string $results) {

      $this->eventId    = $eventId;
      $this->matchName  = $matchName;
      $this->tournament = $tournament;
      $this->results    = $results;
   }
}

$arrayListOfEvents = new ArrayList();
$arrayListOfEvents->add (new Event (1234, 'match1', 'Tour1', '1-0'));
$arrayListOfEvents->add (new Event (5678, 'match2', 'Tour2', '0-1'));
$arrayListOfEvents->add (new Event (7890, 'match3', 'Tour1', '1-2'));


$hashMap = $arrayListOfEvents->stream()
                             ->collect (Collectors::groupingBy (function (Event $event) : string {
                                                                   return $event->tournament;
                                                                }));

您将能够通过以下方式访问存储的元素：

foreach ($hashMap->iterator() as $internalKey => $internalValue) {

    echo "\nKey of current element of Map: ", $internalKey;

    foreach ($internalValue->getIterable()->iterator() as $value) {

        echo "\n\tValue of current element of Map: ", $value->eventId
           , ", " , $value->matchName, ", ", $value->tournament
           , ", ", $value->results;
    }
 }

您将获得以下内容：

Key of current element of Map: Tour1
   Value of current element of Map: 1234, match1, Tour1, 1-0
   Value of current element of Map: 7890, match3, Tour1, 1-2
Key of current element of Map: Tour2
   Value of current element of Map: 5678, match2, Tour2, 0-1

现在您只需要添加所需的HTML标记。

更新

您可以使用以下功能访问mysql数据库：

mysqli_connect
mysqli_fetch_array

请参阅以下链接的示例＃2：

Get results from mysql database

最终的代码可能是这样的：

$link = mysqli_connect ("my_host", "my_user", "my_password", "my_database");
$results = mysqli_query ($link, "select * from events order by Tournament");

$currentTournament = "";
while ($row = mysqli_fetch_array ($results, MYSQLI_ASSOC)) {

   if (strcmp ($currentTournament, $row["Tournament"]) != 0) {

      $currentTournament = $row["Tournament"];
      echo "\n<thead><th>".$currentTournament."</th></thead>";
   }
   echo "\n<tr><td>".$row["EventID"]."</td><td>"
                    .$row["MatchName"]."</td><td>"
                    .$row["Tournament"]."</td><td>"
                    .$row["Results"]."</td></tr>";
}

组数据库记录和回显组名称及其记录

1 个答案:

更新