php - PHP foreach复制输出数据的最后一次迭代

Question

真的很感谢你们的帮助。即使你只是发现一切都很好，你给了我重要的线索来解决它。

//解决方案清除第一个迭代过程，因为我计划在页面开始时将其全部完成，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，然后稍后将其重用于新的迭代。

继承人的工作代码：

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，我对其进行了以下操作：

$groups = db_getCountGroupsElim();

foreach ($groups as &$group) {

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

使用引用将查询结果添加到同一个数组中。如果按原样使用数组，或者使用 JSON 形式，它可以工作。我怀疑它可能必须是关于使用引用和相同的变量名？！

//老的

我有一个数组，有几个级别，主要是 Groups, Games, Players

团体有游戏，游戏有玩家。

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"}]}]}]

样品阵列

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] => JoÃ£o 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
                            )
                    )
            )
    )
)

我正在为每个级别做一个 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，既然所有重要的代码都在这里，我在最后一组的最后一场比赛的最后输出上得到了一个奇怪的结果。

这不是因为特定的组，我试图修改数组以获得更少的结果，并且仍然是相同的最后一个重复输出。

所以我的最后一个DIV，不是获取最后一条记录的数据，而是获取上一条记录，并在两个HTML DIVS中复制，完全相同，但重复。

任何提示或建议都将受到欢迎。

提前致谢。

score 9 · Accepted Answer

带参考的 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。

为了将来参考，您可以在 PHP 的 foreach 函数文档中阅读：

警告

即使在 foreach 循环之后，对 $value 和最后一个数组元素的引用仍然存在。建议通过 unset() 将其销毁。

以下是有关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

score 0 · Accepted Answer

您可能会得到一个有线结果，但我只能告诉您这不是因为您在问题中发布的内容：

<?php

$groups[] = array(
    'id'    => 13,
    'name'  => 'Final',
    'games' => array(
        array(
            'id'           => 65,
            'next_game_id' => 0,
            'players'      => array(
                array('equipa_result' => 0, 'casa_fora' => 1, 'nome' => 'JoÃ£o Monteiro Ribeiro', 'thumb' => 'uploads/1364249922/thumb/foto.png', 'jogador_id' => 6),
                array('equipa_result' => 0, 'casa_fora' => 2, 'nome' => 'Luis Silva', 'thumb' => 'uploads/1364562821/thumb/177158_390926850971196_1987889821_o.jpg', 'jogador_id' => 31),
            ),
        ),
    ),
);

$home_path = '';

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">

            <?php 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>

            <?php } ?>
        </div>

    <?php
    } // foreach
}

该代码运行良好并输出：

<div class="group13 game65 item clearfix">


        <div class="player box1 clearfix">
            <div class="thumb" style="background-image:url(uploads/1364249922/thumb/foto.png)"></div>
            <div class="name">JoÃ£o Monteiro Ribeiro</div>
            <div class="result">0</div>
        </div>


        <div class="player box2 clearfix">
            <div class="thumb" style="background-image:url(uploads/1364562821/thumb/177158_390926850971196_1987889821_o.jpg)"></div>
            <div class="name">Luis Silva</div>
            <div class="result">0</div>
        </div>

            </div>

因此，无论您在哪里犯了错误，都不是在您在问题中提供的代码/数据中犯的。无论如何提示：不要使用短标签，而不是当你在这个网站上说明你的代码时。另请参阅：PHP 短标签是否可以使用？.

score 0 · Accepted Answer

只是看...代码看起来不错，但是您的 $groups 数组中可能有一条额外的记录，这会导致第二个循环的一次额外迭代。

php - PHP foreach复制输出数据的最后一次迭代

3 回答 3

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