0

我有以下代码：

$catsQuery = "
        SELECT id, category
        FROM categories
        ORDER BY category
";
$catsSql = mysqli_query($link, $catsQuery);

$cats = array();

mysqli_data_seek($catsSql, 0);
while($rowCats = mysqli_fetch_assoc($catsSql))
{
    $cats[$rowCats['id']]['catName'] = $rowCats['category'];
}

foreach ($cats as $catKey => $cat['$catName'])
{
    $pageContent .= "<p>$catKey | $catName</p>
    ";
}

这两列id包含category如下数据：

  • 编号 | 类别
  • 1 | 鞋
  • 2 | 衬衫
  • 3 | 帽子

我想做的是将表中的所有行categories变成一个名为的局部变量cats

在 while 循环中，当每个 rows 数组键成为类别 id 时，会生成一个本地数组，然后将类别名称分配给该键。var_dump($cats)表明每一行都被添加到变量中，正如我所描述的。

但是在 foreach 中，由于某种原因，它作为新行返回的每个 id，但类别的名称显示为最后可能的类别名称，跨越所有键。

为什么变量上的转储显示一组数据，但以这种内容方式打印的循环显示这个奇怪的打嗝？

像这样：

  • 1 | 帽子
  • 2 | 帽子
  • 3 | 帽子

如果有人可以阐明我做错了什么导致此问题，将不胜感激。

谢谢你！！

编辑：

由于以下答案而创建的功能代码：

//categories to local array
$catsQuery = "
    SELECT id, category, catDirPath
    FROM categories
    ORDER BY category
";
$catsSql = mysqli_query($link, $catsQuery);
$cats = array();
mysqli_data_seek($catsSql, 0);
while($rowCats = mysqli_fetch_assoc($catsSql))
{
    $cats[$rowCats['id']]['catName'] = $rowCats['category'];
    $cats[$rowCats['id']]['catPath'] = $rowCats['catDirPath'];
}
// subCats to local array
$subsQuery = "
    SELECT id, subCat, category_id, subDirPath
    FROM subCats, sub_categories
    WHERE subCats.id = sub_categories.sub_id
    ORDER BY category_id
";
$subsSql = mysqli_query($link, $subsQuery);
$subs = array();
mysqli_data_seek($subsSql, 0);
while($rowSubs = mysqli_fetch_assoc($subsSql))
{
    $subs[$rowSubs['id']]['subName'] = $rowSubs['subCat'];
    $subs[$rowSubs['id']]['catId'] = $rowSubs['category_id'];
    $subs[$rowSubs['id']]['subPath'] = $rowSubs['subDirPath'];
}
// loop through categories and if subs exist, add to resultset and display  
foreach ($cats as $catId => $cat)
{
    $pageContent .= "
    <div style='margin-bottom: 10px; border black solid 1px;'>
    <ul>
    <li style='list-style-type: none; margin-bottom: 5px;'><a href='$docPath/category/{$cat['catPath']}/'>{$cat['catName']}</a></li>
    ";
    foreach ($subs as $subId => $sub)
    {
        if($sub['catId'] == $catId)
        {
        $pageContent .= "
        <li style='list-style-type: circle; padding-left: 15px; font-size: 70%;'><a href='$docPath/category/{$cat['catPath']}/{$sub['subPath']}/'>{$sub['subName']}</a></li>
        ";
        }
    }
    $pageContent .= "
    </ul>
    </div>
    ";
}
4

2 回答 2

2

构建数组后，您必须像这样执行 foreach 循环：

foreach ($cats as $catId => $cat)
{
    $pageContent .= "<p>$catKey | ".$cat['catName']."</p>";
}

但为什么不$cats[$rowCats['id'] = $rowCats['category'];首先呢？那么这就足够了：

foreach ($cats as $catId => $catName)
{
    $pageContent .= "<p>$catKey | $catName</p>";
}
于 2012-04-22T13:44:22.143 回答
2

你的代码看起来不错。在 while 循环之后，您是否在 $cats 数组上尝试过 var_dump？我怀疑这条线给你带来了问题

foreach ($cats as $catKey => $cat['$catName'])

你可能应该改变它

foreach ($cats as $catKey => $catDetails)
{
    $catName = $catDetails['catName'];
    $pageContent .= "<p>$catKey | $catName</p>";
}
于 2012-04-22T13:44:50.510 回答