Php 如果存在公共值，则将数组中的元素分组

我有一段代码：

foreach($data['matches'] as $record){
    $matchday = $record['matchday'];
    echo '<h4>Round'. $matchday  .'</h4><br>'.$record['homeTeam']['name'].'&nbsp;-&nbsp;'.$record['awayTeam']['name'].'<br>';
}

现在数据显示如下：

Round 1
team 1 - team 2
Round 1
team 3 - team 4
Round 1
team 5 - team 6
Round 2
team 1 - team 2
Round 2
team 3 - team 4
Round 2
team 5 - team 6
ecc..

编辑 这是我正在研究的阵列（我将只参加第一轮的两场比赛）：

---

简单地说，取一个额外的变量，检查当前轮和上一轮的值是否相同

像下面这样

$roundName = "";

foreach($data['matches'] as $record){
    $matchday = $record['matchday'];
    if($roundName != $matchday){
       echo '<h4>Round'. $matchday  .'</h4><br>';
    }
    echo $record['homeTeam']['name'].'&nbsp;-&nbsp;'.$record['awayTeam']['name'].'<br>';
    $roundName = $record['matchday'];
}

---

你的球队名称在比赛日数组中？不，球队名称在主数组中，就像比赛日数组的键一样。我对你的第一个建议有疑问。如何将

$round

变量设置为每次与数组值比较时递增？我将尝试。对于第二种方法，我还需要编写新的数组来实现目标，每轮有十个匹配项，因此我认为这不是最好的方法。@user9741470，好的，使用第一种解决方案。我只是将roundname分配给变量，并检查roundname是否已更改。是的，但在我的示例中，我有一个递增的整数，因此我需要使此解决方案适合我的示例@user9741470你能给我简单解释一下吗？你到底需要什么，我才能解决你的问题对不起，回复太晚了，你有解决办法吗，或者我可以帮你更多？

    array(4) {
  ["count"]=>
  int(380)
  ["filters"]=>
  array(0) {
  }
  ["competition"]=>
  array(6) {
    ["id"]=>
    int(2019)
    ["area"]=>
    array(2) {
      ["id"]=>
      int(2114)
      ["name"]=>
      string(5) "Italy"
    }
    ["name"]=>
    string(7) "Serie A"
    ["code"]=>
    NULL
    ["plan"]=>
    string(8) "TIER_ONE"
    ["lastUpdated"]=>
    string(20) "2018-06-05T00:14:16Z"
  }
  ["matches"]=>
  array(380) {
    [0]=>
    array(12) {
      ["id"]=>
      int(247791)
      ["season"]=>
      array(4) {
        ["id"]=>
        int(290)
        ["startDate"]=>
        string(10) "2018-08-18"
        ["endDate"]=>
        string(10) "2019-05-26"
        ["currentMatchday"]=>
        int(1)
      }
      ["utcDate"]=>
      string(20) "2018-08-18T16:00:00Z"
      ["status"]=>
      string(9) "SCHEDULED"
      ["matchday"]=>
      int(1)
      ["stage"]=>
      string(14) "REGULAR_SEASON"
      ["group"]=>
      string(14) "Regular Season"
      ["lastUpdated"]=>
      string(20) "2018-08-01T18:02:07Z"
      ["homeTeam"]=>
      array(2) {
        ["id"]=>
        int(106)
        ["name"]=>
        string(16) "AC Chievo Verona"
      }
      ["awayTeam"]=>
      array(2) {
        ["id"]=>
        int(109)
        ["name"]=>
        string(11) "Juventus FC"
      }
      ["score"]=>
      array(6) {
        ["winner"]=>
        NULL
        ["duration"]=>
        string(7) "REGULAR"
        ["fullTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["halfTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["extraTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["penalties"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
      }
      ["referees"]=>
      array(0) {
      }
    }
    [1]=>
    array(12) {
      ["id"]=>
      int(247786)
      ["season"]=>
      array(4) {
        ["id"]=>
        int(290)
        ["startDate"]=>
        string(10) "2018-08-18"
        ["endDate"]=>
        string(10) "2019-05-26"
        ["currentMatchday"]=>
        int(1)
      }
      ["utcDate"]=>
      string(20) "2018-08-18T18:30:00Z"
      ["status"]=>
      string(9) "SCHEDULED"
      ["matchday"]=>
      int(1)
      ["stage"]=>
      string(14) "REGULAR_SEASON"
      ["group"]=>
      string(14) "Regular Season"
      ["lastUpdated"]=>
      string(20) "2018-08-01T18:02:07Z"
      ["homeTeam"]=>
      array(2) {
        ["id"]=>
        int(110)
        ["name"]=>
        string(8) "SS Lazio"
      }
      ["awayTeam"]=>
      array(2) {
        ["id"]=>
        int(113)
        ["name"]=>
        string(10) "SSC Napoli"
      }
      ["score"]=>
      array(6) {
        ["winner"]=>
        NULL
        ["duration"]=>
        string(7) "REGULAR"
        ["fullTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["halfTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["extraTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["penalties"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
      }
      ["referees"]=>
      array(0) {
      }
    }
    [2]=>
    array(12) {
      ["id"]=>
      int(247790)
      ["season"]=>
      array(4) {
        ["id"]=>
        int(290)
        ["startDate"]=>
        string(10) "2018-08-18"
        ["endDate"]=>
        string(10) "2019-05-26"
        ["currentMatchday"]=>
        int(1)
      }
      ["utcDate"]=>
      string(20) "2018-08-19T16:00:00Z"
      ["status"]=>
      string(9) "SCHEDULED"
      ["matchday"]=>
      int(1)
      ["stage"]=>
      string(14) "REGULAR_SEASON"
      ["group"]=>
      string(14) "Regular Season"
      ["lastUpdated"]=>
      string(20) "2018-08-01T18:02:07Z"
      ["homeTeam"]=>
      array(2) {
        ["id"]=>
        int(586)
        ["name"]=>
        string(9) "Torino FC"
      }
      ["awayTeam"]=>
      array(2) {
        ["id"]=>
        int(100)
        ["name"]=>
        string(7) "AS Roma"
      }
      ["score"]=>
      array(6) {
        ["winner"]=>
        NULL
        ["duration"]=>
        string(7) "REGULAR"
        ["fullTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["halfTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["extraTime"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
        ["penalties"]=>
        array(2) {
          ["homeTeam"]=>
          NULL
          ["awayTeam"]=>
          NULL
        }
      }
      ["referees"]=>
      array(0) {
      }
    }

$roundName = "";

foreach($data['matches'] as $record){
    $matchday = $record['matchday'];
    if($roundName != $matchday){
       echo '<h4>Round'. $matchday  .'</h4><br>';
    }
    echo $record['homeTeam']['name'].'&nbsp;-&nbsp;'.$record['awayTeam']['name'].'<br>';
    $roundName = $record['matchday'];
}

$array['round1'][0] = 'team 1 - team 2';
$array['round1'][1] = 'team 3 - team 5';
$array['round2'][0] = 'team 1 - team 2';
$array['round2'][1] = 'team 3 - team 5';
................
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$array['roundn'][n] = 'team 3 - team 5';