PHP SimpleXML按元素类型分组 [英] PHP SimpleXML Group By Element Type

问题描述

好的，这是我的困境。我正在寻找一种在PHP中使用 SimpleXML 来整合数据的方法。这就是我的意思。

假设我有一个如下所示的xml：

 < favorites> 
<有趣> 
< type>电影< / type> 
< character>詹姆斯·邦德< / character> 
<名称>皇家赌场< /名称> 
< /有趣> 
<有趣> 
< type>电影< / type> 
< character> Jason Bourne< / character> 
<名称> Bourne身份< /名称> 
< /有趣> 
<有趣> 
< type> Book< / type> 
< character> Lindsay Ford< / character> 
<名称> Shantaram< / name> 
< /有趣> 
< / favorites> 
  

现在就是我想要的样子：

电影

• 皇家赌场 - 詹姆斯庞德伯恩


• Bourne Identity - Jason Bourne

预订

• Shantaram - Lindsay Ford
  

请帮助我！如果有任何事情是令人困惑的，请告诉我们。

/ p>

• 从XML数据提取所有类型
  
  
  
  
  • 让它们为唯一，因为它们可能会出现多次（XPath可能有这种方法;我不知道它，所以我将使用 array_unique ）
  
  


• 遍历这些类型，使用 @ Mark建议。
  / b>
  
  
  
  类似于这可能会这样：

    $ xml = simplexml_load_string（$ xmlData）; 
   
   $ typesListXml = $ xml-> xpath（'interesting / type'）; 
   var_dump（$ typesListXml）; // var_dump＃1 
   
   if（！empty（$ typesListXml））{
   $ typesList = array（）; 
   foreach（$ typesListXml as $ typeXml）{
   $ typesList [] =（string）$ typeXml; 
  } 
   var_dump（$ typesList）; // var_dump＃2 
   
   $ typesList = array_unique（$ typesList）; 
   var_dump（$ typesList）; // var_dump＃3 
   
   $ moviesForType = array（）; 
   foreach（$ typesList as $ type）{
   $ rawData = $ xml-> xpath（'interesting [type ='。$ type。''''）; 
   if（！empty（$ rawData））{
   foreach（$ rawData as $ rawMovie）{
   $ moviesForType [$ type] [] = $ rawMovie->名称。 ' - '。 $ rawMovie-&G​​T;字符; 
  } 
  } 
  } 
   
   var_dump（$ moviesForType）; // var_dump＃4 
   
   //由您自己决定是否要用$ moviesForType ;-) 
   
  } 
    

  
  
  为了让事情更容易理解，下面是var_dump的输出：

  
  
  
  $ b

   数组
   0 =>> var_dump＃1  
   object（SimpleXMLElement）[2] 
   string'Movie'（length = 5）
   1 => 
   object（SimpleXMLElement）[3] 
   string'Movie'（length = 5）
   2 => 
   object（SimpleXMLElement）[4] 
  字符串'Book'（length = 4）
    

  
  
  
  $ b

   数组
   0 =>> var_dump＃2 字符串'Movie'（长度= 5）
   1 =>字符串'电影'（长度= 5）
   2 =>字符串'Book'（长度= 4）
    

  var_dump＃3 ：

   数组
   0 =>字符串'电影'（长度= 5）
   2 =>字符串'Book'（长度= 4）
    

  var_dump＃3 ：

    array 
  'Movie'=> 
  数组
   0 =>字符串'皇家赌场 - 詹姆斯邦德'（长度= 26）
   1 =>字符串'Bourne Identity  -  Jason Bourne'（长度= 30）
  'Book'=> 
  数组
   0 =>字符串'Shantaram  -  Lindsay Ford'（长度= 24）
    

  
  
  现在，您需要按照您的要求呈现这些数据;构建< ul> 和< li> 标签的双foreach循环可能会执行; - ）
  

  Ok here's my dilemma. I am looking for a way to consolidate the data in a group using SimpleXML in PHP. Here's what I mean.

  Let's say I have an xml that looks like this:

    <favorites>
      <interesting>
          <type>Movie</type>
          <character>James Bond</character>
          <name>Casino Royale</name>
      </interesting>
      <interesting>
          <type>Movie</type>
          <character>Jason Bourne</character>
          <name>Bourne Identity</name>
      </interesting>
      <interesting>
          <type>Book</type>
          <character>Lindsay Ford</character>
          <name>Shantaram</name>
      </interesting>
    </favorites>
  

  Now here's what I want that to look like:

  Movie

  • Casino Royale - James Bond Bourne
  • Bourne Identity - Jason Bourne

  Book

  • Shantaram - Lindsay Ford

  Please help me!! Let me know if anything is confusing.

  解决方案

  If you don't know in advance the types of movies, you could :

  • extract all types from the XML data
    • get them as unique, as they may appear several times (There might be a way to do that with XPath ; I don't know it, so I'll use array_unique)
  • iterate over these types, using what @Mark proposed.

  
  Something like this would probably do :

  $xml = simplexml_load_string($xmlData);
  
  $typesListXml = $xml->xpath('interesting/type');
  var_dump($typesListXml);    // var_dump #1
  
  if (!empty($typesListXml)) {
      $typesList = array();
      foreach ($typesListXml as $typeXml) {
          $typesList[] = (string)$typeXml;
      }
      var_dump($typesList);    // var_dump #2
  
      $typesList = array_unique($typesList);
      var_dump($typesList); // var_dump #3
  
      $moviesForType = array();
      foreach ($typesList as $type) {
          $rawData = $xml->xpath('interesting[type="' . $type . '"]');
          if (!empty($rawData)) {
              foreach ($rawData as $rawMovie) {
                  $moviesForType[$type][] = $rawMovie->name . ' - ' . $rawMovie->character;
              }
          }
      }
  
      var_dump($moviesForType); // var_dump #4
  
      // Up to you to present $moviesForType the way you want ;-)
  
  }
  

  
  And to make things easier to understand, here are the var_dump's outputs :

  var_dump #1 :

  array
    0 => 
      object(SimpleXMLElement)[2]
        string 'Movie' (length=5)
    1 => 
      object(SimpleXMLElement)[3]
        string 'Movie' (length=5)
    2 => 
      object(SimpleXMLElement)[4]
        string 'Book' (length=4)
  

  var_dump #2 :

  array
    0 => string 'Movie' (length=5)
    1 => string 'Movie' (length=5)
    2 => string 'Book' (length=4)
  

  var_dump #3 :

  array
    0 => string 'Movie' (length=5)
    2 => string 'Book' (length=4)
  

  var_dump #3 :

  array
    'Movie' => 
      array
        0 => string 'Casino Royale - James Bond' (length=26)
        1 => string 'Bourne Identity - Jason Bourne' (length=30)
    'Book' => 
      array
        0 => string 'Shantaram - Lindsay Ford' (length=24)
  

  
  Now, it's up to you to present those data the way you want ; a double-foreach loop constructing <ul> and <li> tags would probably do ;-)

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