PHP解析XML並按字母順序對子節點排序

Question

我有一個XML文件，並將其解析為我的PHP文檔。 我想按字母順序對XML的子節點進行排序，並在選擇框中顯示它們。 有人可以幫幫我嗎？ 我在排序過程中陷入困境... :)

country.xml

    <?xml version="1.0"?>
<countries>
    <country>
        <name>Deutschland</name>
        <league>Bundesliga</league>
    </country>
    <country>
        <name>Frankreich</name>
        <league>Ligue 1</league>
    </country>
    <country>
        <name>Osterreich</name>
        <league>Tipp3-Bundesliga</league>
    </country>
    <country>
        <name>England</name>
        <league>Premier League</league>
    </country>
    <country>
        <name>Schweden</name>
        <league>Allsvenskan</league>
    </country>
    <country>
        <name>Kanada</name>
        <league>Canadian Soccer League</league>
    </country>
</countries>

我的PHP代碼如下所示：

echo "<select>";    
foreach ($newXml as $item) {
   $country=$item->name;
   $league=$item->league;
   echo $league;
   echo "<option>".$country."-".$league."</option>";
}
   echo "</select>";

Answer 1

您可以通過三個步驟執行此操作：

// 1. collect
foreach ($newXml as $country) {
  $items[] = "{$country->name} - {$country->league}";
}
// 2. sort (on country and league in this case)
sort($items);
// 3. enumerate
echo '<select>';
foreach ($items as $item) {
  echo '<option>', htmlspecialchars($item), '</option>';
}
echo '</select>';

Answer 2

您可以在創建選擇框之前使用數組。

echo "<select>";    
$temp =  array()
foreach ($newXml as $item)
   $temp [$item->name] = $item->league;

ksort($temp);
foreach ($teml as $name => $league) {
   $country=$name;
   $league=$league;
   echo $league;
   echo "<option>".$country."-".$league."</option>";
}
   echo "</select>";

它是盲目的...應該起作用。