如何在 PHP 和 XML 中使用 foreach (simplexml)

Question

有知道 PHP 和 XML 的人吗？那么请看一下！

这是我的 PHP 代码：

<? $xml = simplexml_load_file("movies.xml");
foreach ($xml->movie as $movie){ ?>

<h2><? echo $movie->title ?></h2>
<p>Year: <? echo $movie->year ?></p>
<p>Categori: <? echo $movie->regions->region->categories->categorie ?></p>
<p>Country: <? echo $movie->countries->country ?></p>

<? } ?>

这是我的 XML 文件：

<?xml version="1.0" encoding="UTF-8"?>
<movies>
 <movie>
  <title>A movie name</title>
  <year>2010</year>
     <regions>
   <region>
    <categories>
      <categorie id="3">Animation</categorie>
      <categorie id="5">Comedy</categorie>
      <categorie id="9">Family</categorie>
     </categories>
    <countries>
     <country id="123">USA</country>
    </countries>
   </region>
  </regions>
 </movie>
 <movie>
  <title>Little Fockers</title>
  <year>2010</year>
     <regions>
   <region>
    <categories>
     <categorie id="5">Comedy</categorie>
             </categories>
        <countries>
         <country id="123">USA</country>
    </countries>
   </region>
  </regions>
 </movie>
</movies>

上面代码的结果是：

<h2>A movie name</h2>
<p>Year: 2010</p>
<p>Category: Animation</p>
<p>Country: USA</p>

<h2>Little Fockers</h2>
<p>Year: 2010</p>
<p>Category: Comedy</p>
<p>Country: USA</p>

我希望它是这样的（参见第一部电影的类别）：

<h2>A movie name</h2>
<p>Year: 2010</p>
<p>Category: Animation, Comedy, Family</p>
<p>Country: USA</p>

<h2>Little Fockers</h2>
<p>Year: 2010</p>
<p>Category: Comedy</p>
<p>Country: USA</p>

注意：我也想知道如何获得单词之间的逗号，但最后一个单词没有逗号......

Answer 1

您还需要遍历 categorie 元素，就像您遍历 movies 一样。

echo '<p>';
foreach($movie->regions->region->categories->categorie as $categorie){
    echo $categorie . ', ';
}
echo '</p>';

您可能还想修剪尾随的,。

---

我评论中提到的方法：

$categories = $movie->regions->region->categories->categorie;
while($category = current($categories)){
    echo $category . next($categories) ? ', ' : '';
}

Answer 2

<? foreach($movie->regions->region->categories->categorie as $category) { ?>
<p>Categori: <?= $category ?></p>
<? } ?>

Answer 3

试试这个。

<?php
$xml = simplexml_load_file("movies.xml");
foreach ($xml->movie as $movie) {

    echo '<h2>' . $movie->title . '</h2>';
    echo '<p>' . $movie->year . '</p>';

    $categories = $movie->regions->region->categories->categorie;

    while ($categorie = current($categories)) {
        echo $categorie;
        echo next($categories) ? ', ' : null;
    }

    echo '<p>' . $movie->countries->country . '</p>';
}
?>

Answer 4

function categoryList(SimpleXmlElement $categories){
  $cats = array();
  foreach($categories as $category){
    $cats[] = (string) $category;
  }

  return implode(', ', $cats);

}

然后你可以直接从你的循环中调用它：

<? echo categoryList($movie->regions->region->categories); ?>

使用数组和implode 消除了对计数和检测最后一个类别的逻辑的需要。

将它隔离在一个函数中更容易维护，并且比嵌套循环更容易混淆（尽管嵌套循环确实不会那令人困惑）。

Answer 5

<?php
$cat_out='';
foreach($movie->regions->region->categories->categorie as $cat){
 $cat_out.= $cat.',';
}
echo rtrim($cat_out,',');
?>

Answer 6

这就是你如何将 foreach 与 simplexmlElement 一起使用：

$xml = simplexml_load_file("movies.xml");
foreach ($xml->children() as $children) {
    echo $children->name;
}

Answer 7

试试这个

$xml = ... // Xml file data
$Json = Xml_to_Json($xml);
$array = json_decode($Json,true);
echo '<pre>'; print_r($array);
foreach ($array as $key => $value) {
    foreach ($value as $key1 => $value1) {
        echo '<h2>'.$value1['title'].'</h2>
        <p>Year: '.$value1['year'].'</p>
        <p>Category: ';
        foreach ($value1['regions']['region']['categories']['categorie'] as $categoriekey => $categorie) {
            echo $categorie.' ';                
        }
        echo 'Animation</p>
        <p>Country: '.$value1['regions']['region']['countries']['country'].'</p>';
    }
}

function Xml_to_Json($array){
    $xml = simplexml_load_string($array, "SimpleXMLElement", LIBXML_NOCDATA);
    $json = json_encode($xml);
    return $json;
}