如何将一个值放在多个类别中答案

【问题标题】：How to put a value in multiple categories如何将一个值放在多个类别中
【发布时间】：2014-04-23 16:45:27
【问题描述】：

在我解决了在我的数据库中的game_category 字段下查看多个游戏类别的问题后，我遇到了另一个问题。我的网站通过$game_category 变量决定哪个游戏属于哪个类别，但是现在，我插入了一个有 4 个类别的游戏，所以game_category 记录下的“动作”不是“动作，空间，策略，射击” ，所以游戏无处可去...

这是我的代码的一部分，显示了按游戏类别查看结果的逻辑：

if(isset($_GET['genre'])){

 $game_category = $_GET['genre'];

 $select_games = "SELECT * FROM games WHERE game_category='$game_category' ORDER BY game_name ASC";

我怎样才能使系统读取具有多个类别的记录？

有什么想法吗？ :(

编辑：由于我的问题中没有足够的信息，我将在这里发布 2 个涉及问题的 php 文件： 1. "insert_games.php" - 用于通过管理面板上传新游戏（完美运行）。 2. "categories.php" - 用于查看游戏所属的正确类别。

这是 insert_games.php：

<?php
session_start();

if(!isset($_SESSION['user_name'])){

header("location:login.php");

}
else {
?>
<?php
include("../includes/connect.php");

if(isset($_POST['submit'])){

$game_name = $_POST['game_name'];
$game_category = implode(",",$_POST['game_category']);
$game_keywords = $_POST['game_keywords'];
$game_image = $_FILES['game_image']['name'];
$image_tmp = $_FILES['game_image']['tmp_name'];
$game_code = $_FILES['game_code']['name'];
$code_tmp = $_FILES['game_code']['tmp_name'];
$game_file = $_FILES['game_file']['name'];
$file_tmp = $_FILES['game_file']['tmp_name'];
$game_desc = $_POST['game_desc'];

if($game_name=='' or $game_category=='' or $game_keywords=='' or $game_image=='' or $game_code=='' or $game_file==''){

echo "<script>alert('Please enter all the fields below!')</script>";

exit();

}
else {

 $path = "../games/$game_name";

 mkdir("$path", 0777);

 move_uploaded_file($image_tmp,"../images/games_images/$game_image");

 move_uploaded_file($code_tmp,"$path/$game_code");

 move_uploaded_file($file_tmp,"$path/$game_file");

 $insert_query = "insert into games (game_name,game_category,game_keywords,game_image,game_code,game_file,game_desc) values ('$game_name','$game_category','$game_keywords','$game_image','$game_code','$game_file','$game_desc')";

 if($game_category == '3d'){

 $three_d_status = 'checked';

 }
 if($game_category == 'action'){

 $action_status = 'checked';

 }
 if($game_category == 'adventure'){

 $adventure_status = 'checked';

 }
 if($game_category == 'arcade'){

 $arcade_status = 'checked';

 }
 if($game_category == 'brain'){

 $brain_status = 'checked';

 }
 if($game_category == 'cards'){

 $cards_status = 'checked';

 }
 if($game_category == 'destruction'){

 $destruction_status = 'checked';

 }
 if($game_category == 'education'){

 $education_status = 'checked';

 }
 if($game_category == 'extreme'){

 $extreme_status = 'checked';

 }
 if($game_category == 'fighting'){

 $fighting_status = 'checked';

 }
 if($game_category == 'flying'){

 $flying_status = 'checked';

 }
 if($game_category == 'girls'){

 $girls_status = 'checked';

 }
 if($game_category == 'holidays'){

 $holidays_status = 'checked';

 }
 if($game_category == 'hidden_objects'){

 $hidden_objects_status = 'checked';

 }
 if($game_category == 'motocross'){

 $motocross_status = 'checked';

 }
 if($game_category == 'multiplayer'){

 $multiplayer_status = 'checked';

 }
 if($game_category == 'new'){

 $new_status = 'checked';

 }
 if($game_category == 'puzzle'){

 $puzzle_status = 'checked';

 }
 if($game_category == 'racing'){

 $racing_status = 'checked';

 }
 if($game_category == 'fps'){

 $fps_status = 'checked';

 }
 if($game_category == 'space'){

 $space_status = 'checked';

 }
 if($game_category == 'sports'){

 $sports_status = 'checked';

 }
 if($game_category == 'strategy'){

 $strategy_status = 'checked';

 }
 if($game_category == 'stunt'){

 $stunt_status = 'checked';

 }
 if($game_category == 'top_rated'){

 $top_rated_status = 'checked';

 }
 if($game_category == 'words'){

 $words_status = 'checked';

 }
 if($game_category == 'zombies'){

 $zombies_status = 'checked';

 }

 if(mysql_query($insert_query)){

 echo "<script>alert('The Game Uploaded Successfully!')</script>";

 echo "<script>window.open('view_games.php','_self')</script>";

 }

}

}

?>

<?php } ?>

<!DOCTYPE HTML>
<html>
<head>
<link href="css/insert_game.css" rel="stylesheet" type="text/css">
</head>
<body>

<form method="post" id="insert_form" action="insert_games.php" enctype="multipart/form-data">

<table id="insert_games_table" width="680" border="1" align="center">

<tr>
 <td id="insert_games_table_title" colspan="2" align="center">Insert New Game</td>
</tr>

<tr>
 <td id="insert_cat_name">Game name:</td>
 <td><input type="text" name="game_name" size="80"></td>
</tr>

<tr>
 <td id="insert_cat_name">Game category:</td>
 <td id="insert_cat_select"><input class="checkbox" type="checkbox" name="game_category[]" value="3d"<?php print $three_d_status; ?>/><span>3D</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="action"<?php print $action_status; ?>/><span>Action</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="adventure"<?php print $adventure_status; ?>/><span>Adventure</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="arcade"<?php print $arcade_status; ?>/><span>Arcade</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="brain"<?php print $brain_status; ?>/><span>Brain</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="cards"<?php print $cards_status; ?>/><span>Cards</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="destruction"<?php print $destruction_status; ?>/><span>Destruction</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="education"<?php print $education_status; ?>/><span>Education</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="extreme"<?php print $extreme_status; ?>/><span>Extreme</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="fighting"<?php print $fighting_status; ?>/><span>Fighting</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="flying"<?php print $flying_status; ?>/><span>Flying</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="girls"<?php print $girls_status; ?>/><span>Girls</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="holidays"<?php print $holidays_status; ?>/><span>Holidays</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="hidden_objects"<?php print $hidden_objects_status; ?>/><span>Hidden Objects</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="motocross"<?php print $motocross_status; ?>/><span>Motocross</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="multiplayer"<?php print $multiplayer_status; ?>/><span>Multiplayer</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="new"<?php print $new_status; ?>/><span>New Games</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="puzzle"<?php print $puzzle_status; ?>/><span>Puzzle</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="racing"<?php print $racing_status; ?>/><span>Racing</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="fps"<?php print $fps_status; ?>/><span>FPS</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="space"<?php print $space_status; ?>/><span>Space</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="sports"<?php print $sports_status; ?>/><span>Sports</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="strategy"<?php print $strategy_status; ?>/><span>Strategy</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="stunt"<?php print $stunt_status; ?>/><span>Stunt</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="top_rated"<?php print $top_rated_status; ?>/><span>Top Rated</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="words"<?php print $words_status; ?>/><span>Words</span><br>
 <input class="checkbox" type="checkbox" name="game_category[]" value="zombies"<?php print $zombies_status; ?>/><span>Zombies</span><br></td>
</tr>

<tr>
 <td id="insert_cat_name">Game keywords:</td>
 <td><textarea id="insert_text_area" name="game_keywords"></textarea></td>
</tr>

<tr>
 <td id="insert_cat_name">Game image:</td>
 <td><input type="file" name="game_image"></td>
</tr>

<tr>
 <td id="insert_cat_name">Game HTML:</td>
 <td><input type="file" name="game_code"></td>
</tr>

<tr>
 <td id="insert_cat_name">Game Flash File:</td>
 <td><input type="file" name="game_file"></td>
</tr>

<tr>
 <td id="insert_cat_name">Game description:</td>
 <td><textarea id="insert_text_area" name="game_desc"></textarea></td>
</tr>

<tr>
 <td colspan="2" align="center"><input type="submit" name="submit" value="Publish Game Now" id="insert_submit"></td>
</tr>

</form>

</body>
</html>

我知道它有点太长了，因为有很多类别使用 HTML 表单和“if”语句...

这是categories.php：

<!DOCTYPE HTML>
<html>
<head>
</head>
<body>

 <div class='container'> <!--Start of the container-->

 <div><?php include("includes/header.php"); ?></div>
 <div><?php include("includes/navbar.php"); ?></div>
 <div><?php include("includes/right_col.php"); ?></div>

 <div class='main_col'> <!--Start of the Main Column-->

 <div><?php echo '<img id="category_title" src="images/genres/' . $_GET[genre] . '.png"'; ?></div>

 <div class='main_content'>
 <?php
 include("includes/connect.php");

 if(isset($_GET['genre'])){

 $game_category = $_GET['genre'];

 $select_games = "SELECT * FROM games WHERE game_category IN ($game_category) ORDER BY game_name ASC";

 $run_games = mysql_query($select_games);

 echo '<table>';
$games = 0;
while($row = mysql_fetch_array($run_games)){
   // make a new row after 9 games
   if($games%9 == 0) {
      if($games > 0) {
         // and close the previous row only if it's not the first
         echo '</tr>';
      }
      echo '<tr>';
   }
   // make a new column after 3 games
   if($games%3 == 0) {
      if($games > 0) {
         // and only close it if it's not the first game
         echo '</td>';
      }
      echo '<td>';
   }

   $game_id = $row['game_id'];
   $game_name = $row['game_name'];
   $game_category = $row['game_name'];
   $game_keywords = $row['game_name'];
   $game_image = $row['game_image'];
   ?>
<div class="game_grid">
   <div id="game_name"><a href="game_page.php?id=<?php echo $game_id; ?>"><?php echo $game_name; ?></a><br /></div>
   <div id="game_image"><a href="game_page.php?id=<?php echo $game_id; ?>"><img src="images/games_images/<?php echo $game_image; ?>" width="120" height="120" /></a></div>
</div>
   <?php 
$games++;  
}

}
?>
</table>
</div>
</div> <!--End of the Main Column-->

 </div> <!--End of the container-->

 <div><?php include("includes/footer.php"); ?></div>

</body>
</html>

注意：我从标签中删除了所有内容，因为它是私有的并且与问题无关 :)...

【问题讨论】：

显示你的表结构和所需的输出......你可以使用 sqlfiddle 来做到这一点；）
你可以随机化那个问题中的单词，这会很有意义
我没有得到你的答案...你能解释一下吗？ :o

标签： php mysql record

【解决方案1】：

您很可能需要一个查找表。由 id（唯一）、game_id（外键）和 category_id（或 category_name）组成的 game_categories 表。这样，您可以将相同的游戏存储在多个类别中。然后，您的查询可以在运行时加入，具体取决于您要完成的工作。我希望这会有所帮助！

【讨论】：

好主意！我现在就试试；）

【解决方案2】：

您可以切换您的选择字符串以使用“IN”。

$cat = "'" . str_replace(",", "','", $game_category) . "'";
$select_games = "SELECT * FROM games WHERE game_category IN ($cat) ORDER BY     game_name ASC";

【讨论】：

我收到一个错误：“mysql_fetch_array(): 提供的参数不是有效的 MySQL 结果资源”
如果他正在查找所有列出的类别中的所有游戏，这将解决问题，但他正在寻找一个包含 4 个类别（串联，在一个列中）的游戏，通过单个搜索其中之一（“行动”）
误解了他的要求。修复了上面的代码以修复他遇到的错误。
谢谢，我会试试的:)
我现在得到了以前只有 1 个类别的游戏，但我没有得到我分配到 4 个类别的游戏......

【解决方案3】：

我又自己解决了这个问题xD，我想到了我的搜索引擎，它使用关键字来生成我的结果，所以，我对 game_category 做了同样的事情，因为它在某些游戏中的结构是相同的，例如： "games" 表中 game_category 记录下有 1 个类别的游戏：动作

“games”表中game_category记录下的多类别游戏：动作、街机、射击、fps...

所以我从这里替换了这一行：

$select_games = "SELECT * FROM games WHERE game_category='$game_category' ORDER BY game_name ASC";

进入这个：

$select_games = "SELECT * FROM games WHERE game_category LIKE '%$game_category%' ORDER BY game_name ASC";

所以现在，如果我在我的网站上的“动作”类别下，这个游戏会显示，如果我在“街机”类别下，这个游戏也会显示，基本上游戏会在任何类别下显示它是通过“阅读”类别关键字来分配的......

希望对某人有所帮助；）

【讨论】：