PHP foreach 复制输出数据的最后一次迭代

Question

真的很感谢大家的帮助。即使你只是发现一切都很好，你给了我解决它的重要线索。

//解决方案 清除第一个迭代过程，因为我计划在页面开始时全部完成，并将其移至主迭代。我真的不知道发生了什么，只是有一个关于引用变量的线索，然后在以后的新迭代中重用它。

这是工作代码:

foreach ($groups as $group) {                   
$group['games'] = db_getGamesElimbyGroup ($group['id']);
    $class_by_groupID = $group['id'];

foreach ($group['games'] as $game) {
   $game['players'] = db_getPlayerElimbyGames($game['id']);             
   $class_by_gameID = $game['id']; ?>
   <div class="group<?=$class_by_groupID?> game<?=$class_by_gameID?> item clearfix">

    <?  foreach ($game['players'] as $player) { ?>

            <div class="player box<?=$player['casa_fora']?> clearfix">
                <div class="thumb" style="background-image:url(<?=$home_path.$player['thumb']?>)"></div>
                <div class="name"><?=$player['nome']?></div>
                <div class="result"><?=$player['equipa_result']?></div>
            </div>

            <?  } ?>
       </div>

     <?}
 }

//解决方案结束 //新

在获取数组之前我用它做了这个操作:

$groups = db_getCountGroupsElim();

foreach ($groups as &$group) {

   foreach ($group['games'] as &$game) {
      $game['players'] = db_getPlayerElimbyGames($game['id']);
   }
}

使用引用将查询的结果添加到同一个数组中。如果按原样使用数组或 JSON 形式，它就可以工作。我怀疑这可能与使用引用和相同的变量名有关？!

//老

我有一个数组，有几个级别，主要是Groups，Games，Players

群组获得游戏，游戏获得玩家。

像这样。

JSON

 [{"id":"9","name":"Oitavos","games":[{"id":"49","next_game_id":"58","players":[{"equipa_result":"0","casa_fora":"1","nome":"Lucas Neves Castro","thumb":"uploads\/1364040943\/thumb\/dsc01491.jpg","jogador_id":"2"},{"equipa_result":"1","casa_fora":"2","nome":"Jo\u00e3o Monteiro Ribeiro","thumb":"uploads\/1364249922\/thumb\/foto.png","jogador_id":"6"}]},{"id":"50","next_game_id":"58","players":[{"equipa_result":"1","casa_fora":"1","nome":"Lu\u00eds Salgado","thumb":"uploads\/1364229837\/thumb\/20130322171159.jpg","jogador_id":"1"},{"equipa_result":"0","casa_fora":"2","nome":"Pedro Fernandes","thumb":"uploads\/1364759964\/thumb\/sam_0255.jpg","jogador_id":"32"}]},{"id":"51","next_game_id":"59","players":[{"equipa_result":"1","casa_fora":"1","nome":"Pedro Costa","thumb":"uploads\/1364126670\/thumb\/pedro.jpg","jogador_id":"12"},{"equipa_result":"0","casa_fora":"2","nome":"Jos\u00e9 Vieira","thumb":"uploads\/1364134124\/thumb\/19084_540280705996807_1199242145_n.jpg","jogador_id":"13"}]},{"id":"52","next_game_id":"59","players":[{"equipa_result":"1","casa_fora":"1","nome":"Jos\u00e9 Peixoto","thumb":"uploads\/1364099591\/thumb\/foto.jpg","jogador_id":"10"},{"equipa_result":"0","casa_fora":"2","nome":"Pedro Sousa","thumb":"uploads\/1364150593\/thumb\/552121_566863856670835_1922080433_n.jpg","jogador_id":"16"}]},{"id":"53","next_game_id":"60","players":[{"equipa_result":"1","casa_fora":"1","nome":"Lu\u00eds Carvalho","thumb":"uploads\/1364150836\/thumb\/598590_119690038195872_1425120299_n.jpg","jogador_id":"17"},{"equipa_result":"0","casa_fora":"2","nome":"Jo\u00e3o Fernandes","thumb":"uploads\/1364171606\/thumb\/img_20130314_222526.jpg","jogador_id":"24"}]},{"id":"54","next_game_id":"60","players":[{"equipa_result":"1","casa_fora":"1","nome":"Patr\u00edcio Correia Santos","thumb":"uploads\/1364156207\/thumb\/dsc01877.jpg","jogador_id":"19"},{"equipa_result":"0","casa_fora":"2","nome":"Tiago Fernandes","thumb":"uploads\/1364171076\/thumb\/4232037_big.jpg","jogador_id":"23"}]},{"id":"55","next_game_id":"61","players":[{"equipa_result":"0","casa_fora":"1","nome":"Carlos Miguel Da Silva Lopes","thumb":"uploads\/1364217431\/thumb\/miguel1.jpg","jogador_id":"26"},{"equipa_result":"1","casa_fora":"2","nome":"Luis Silva","thumb":"uploads\/1364562821\/thumb\/177158_390926850971196_1987889821_o.jpg","jogador_id":"31"}]},{"id":"56","next_game_id":"61","players":[{"equipa_result":"0","casa_fora":"1","nome":"Tiago Teixeira Castro","thumb":"uploads\/1364220392\/thumb\/tiago.jpg","jogador_id":"27"},{"equipa_result":"1","casa_fora":"2","nome":"Hugo Pereira Castro","thumb":"uploads\/1364771622\/thumb\/263386_241332222564106_3344558_n.jpg","jogador_id":"29"}]}]},{"id":"10","name":"Quartos","games":[{"id":"58","next_game_id":"62","players":[{"equipa_result":"1","casa_fora":"1","nome":"Jo\u00e3o Monteiro Ribeiro","thumb":"uploads\/1364249922\/thumb\/foto.png","jogador_id":"6"},{"equipa_result":"0","casa_fora":"2","nome":"Lu\u00eds Salgado","thumb":"uploads\/1364229837\/thumb\/20130322171159.jpg","jogador_id":"1"}]},{"id":"59","next_game_id":"63","players":[{"equipa_result":"0","casa_fora":"1","nome":"Pedro Costa","thumb":"uploads\/1364126670\/thumb\/pedro.jpg","jogador_id":"12"},{"equipa_result":"1","casa_fora":"2","nome":"Jos\u00e9 Peixoto","thumb":"uploads\/1364099591\/thumb\/foto.jpg","jogador_id":"10"}]},{"id":"60","next_game_id":"62","players":[{"equipa_result":"1","casa_fora":"1","nome":"Patr\u00edcio Correia Santos","thumb":"uploads\/1364156207\/thumb\/dsc01877.jpg","jogador_id":"19"},{"equipa_result":"0","casa_fora":"2","nome":"Lu\u00eds Carvalho","thumb":"uploads\/1364150836\/thumb\/598590_119690038195872_1425120299_n.jpg","jogador_id":"17"}]},{"id":"61","next_game_id":"63","players":[{"equipa_result":"1","casa_fora":"1","nome":"Luis Silva","thumb":"uploads\/1364562821\/thumb\/177158_390926850971196_1987889821_o.jpg","jogador_id":"31"},{"equipa_result":"0","casa_fora":"2","nome":"Hugo Pereira Castro","thumb":"uploads\/1364771622\/thumb\/263386_241332222564106_3344558_n.jpg","jogador_id":"29"}]}]},{"id":"11","name":"Meias","games":[{"id":"62","next_game_id":"65","players":[{"equipa_result":"1","casa_fora":"1","nome":"Jo\u00e3o Monteiro Ribeiro","thumb":"uploads\/1364249922\/thumb\/foto.png","jogador_id":"6"},{"equipa_result":"0","casa_fora":"2","nome":"Patr\u00edcio Correia Santos","thumb":"uploads\/1364156207\/thumb\/dsc01877.jpg","jogador_id":"19"}]},{"id":"63","next_game_id":"65","players":[{"equipa_result":"0","casa_fora":"1","nome":"Jos\u00e9 Peixoto","thumb":"uploads\/1364099591\/thumb\/foto.jpg","jogador_id":"10"},{"equipa_result":"1","casa_fora":"2","nome":"Luis Silva","thumb":"uploads\/1364562821\/thumb\/177158_390926850971196_1987889821_o.jpg","jogador_id":"31"}]}]},{"id":"12","name":"3\u00ba e 4\u00ba","games":[{"id":"64","next_game_id":"0","players":[{"equipa_result":"0","casa_fora":"1","nome":"Patr\u00edcio Correia Santos","thumb":"uploads\/1364156207\/thumb\/dsc01877.jpg","jogador_id":"19"},{"equipa_result":"0","casa_fora":"2","nome":"Jos\u00e9 Peixoto","thumb":"uploads\/1364099591\/thumb\/foto.jpg","jogador_id":"10"}]}]},{"id":"13","name":"Final","games":[{"id":"65","next_game_id":"0","players":[{"equipa_result":"0","casa_fora":"1","nome":"Jo\u00e3o Monteiro Ribeiro","thumb":"uploads\/1364249922\/thumb\/foto.png","jogador_id":"6"},{"equipa_result":"0","casa_fora":"2","nome":"Luis Silva","thumb":"uploads\/1364562821\/thumb\/177158_390926850971196_1987889821_o.jpg","jogador_id":"31"}]}]}]

样本阵列

Array
(
[id] => 13
[name] => Final
[games] => Array
    (
        [0] => Array
            (
                [id] => 65
                [next_game_id] => 0
                [players] => Array
                    (
                        [0] => Array
                            (
                                [equipa_result] => 0
                                [casa_fora] => 1
                                [nome] => João Monteiro Ribeiro
                                [thumb] => uploads/1364249922/thumb/foto.png
                                [jogador_id] => 6
                            )

                        [1] => Array
                            (
                                [equipa_result] => 0
                                [casa_fora] => 2
                                [nome] => Luis Silva
                                [thumb] => uploads/1364562821/thumb/177158_390926850971196_1987889821_o.jpg
                                [jogador_id] => 31
                            )
                    )
            )
    )
)

我正在为每个级别执行一个 foreach，以创建可以使用 css 更轻松地设置样式的单个元素。

我的迭代是这样的:

foreach ($groups as $group) {                   

    $class_by_groupID = $group['id'];

foreach ($group['games'] as $game) {

   $class_by_gameID = $game['id']; ?>
   <div class="group<?=$class_by_groupID?> game<?=$class_by_gameID?> item clearfix">

    <?  foreach ($game['players'] as $player) { ?>

            <div class="player box<?=$player['casa_fora']?> clearfix">
                <div class="thumb" style="background-image:url(<?=$home_path.$player['thumb']?>)"></div>
                <div class="name"><?=$player['nome']?></div>
                <div class="result"><?=$player['equipa_result']?></div>
            </div>

            <?  } ?>
       </div>

     <?}
 }

好的，现在所有重要的代码都在这里了，我在最后一组的最后一场比赛的最后输出中得到了一个奇怪的结果。

这不是因为特定的组，我尝试修改数组以获得更少的结果，但仍然是相同的最后重复输出。

所以我的最后一个 DIV，不是获取最后一条记录的数据，而是获取前一条记录的数据，并在两个 HTML DIVS 中重复，只是相同，但重复。

我们非常欢迎任何提示或建议。

提前致谢。

Answer 1

带引用的 foreach 是我的第一个想法，但由于您的原始代码没有显示它，所以我没有提到它。

为了将来引用，您可以在 PHP 的 foreach 函数文档中阅读:

Warning

Reference of a $value and the last array element remain even after the foreach loop. It is recommended to destroy it by unset().

这是一个关于如何解决该问题的示例:

<?php
    $arr = array(1, 2, 3, 4);
    foreach ($arr as &$value) {
        $value = $value * 2;
    }
    // $arr is now array(2, 4, 6, 8)
    unset($value); // break the reference with the last element