为每件事运行两个查询

Question

不好意思，但是我真的不知道该怎么解释！

基本上，我想从一个表中查询游戏类别，然后从另一个表中查询游戏，该表等于从类别表中查询的类别的类别。

到目前为止我了解了吗？

这是我到目前为止的代码...

$get_categories_query = mysql_query("
  SELECT * 
    FROM game_categories 
ORDER BY category_name ASC");
while ($row = mysql_fetch_array($get_categories_query)) {
  $category_name      = $row['category_name'];
  $get_category_games = mysql_query("
    SELECT * 
      FROM games 
     WHERE category = '$category_name' 
  ORDER BY RAND() LIMIT 5");
  while ($row = mysql_fetch_array($get_category_games)) {
    $category_game_id    = $row['id'];
    $category_game_title = $row['game_title'];
    $category_game_display .= '<li><img 
      class="category_module_img" 
      src="http://www.game.assets.buddyweb.me/' . 
        $category_game_id . 
        '/_thumb_100x100.png"></li>';
  }
  $category_display .= '<div class = "category_module">
  <h4>'.$category_name.'</h4>
  '.$category_game_display.'
  <div class="play_more_btn">More</div>
  </div>';
}

但是我从中得到的是列表中第一个类别的查询中出现的每个游戏。

Answer 1

我认为问题是$ row变量。

尝试这个：

$get_categories_query = mysql_query("SELECT * FROM game_categories ORDER BY category_name ASC");

while($row = mysql_fetch_array($get_categories_query))
{
    $category_name = $row['category_name'];
    $get_category_games = mysql_query("SELECT * FROM games WHERE category = '$category_name' ORDER BY RAND() LIMIT 5");
    $category_game_display = false; // new!!

    while($row_cat = mysql_fetch_array($get_category_games))
    {
        $category_game_id = $row_cat['id'];
        $category_game_title = $row_cat['game_title'];
        $category_game_display .= '<li><img class = "category_module_img" src = "http://www.game.assets.buddyweb.me/'.$category_game_id.'/_thumb_100x100.png"></li>';
    }

    $category_display .= '<div class = "category_module"><h4>'.$category_name.'</h4>'.$category_game_display.'<div class = "play_more_btn">More</div></div>';
}