XML Feed 获取打印值

Question

这是我的提要：

 <entry>
    <id>http://api.visitmix.com/OData.svc/Sessions(guid'816995df-b09a-447a-9391-019512f643a0')</id>
    <title type="text">Building Web Applications with Microsoft SQL Azure</title>
    <summary type="text">SQL Azure provides a highly available and scalable relational database engine in the cloud. In this demo-intensive and interactive session, learn how to quickly build web applications with SQL Azure Databases and familiar web technologies. We demonstrate how you can quickly provision, build and populate a new SQL Azure database directly from your web browser. Also, see firsthand several new enhancements we are adding to SQL Azure based on the feedback we&#x2019;ve received from the community since launching the service earlier this year.</summary>
    <published>2010-01-25T00:00:00-05:00</published>
    <updated>2010-03-05T01:07:05-05:00</updated>
    <author>
      <name />
    </author>
    <link rel="edit" title="Session" href="Sessions(guid'816995df-b09a-447a-9391-019512f643a0')" />
    <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Speakers" type="application/atom+xml;type=feed" title="Speakers" href="Sessions(guid'816995df-b09a-447a-9391-019512f643a0')/Speakers">
      <m:inline>
        <feed>
          <title type="text">Speakers</title>
          <id>http://api.visitmix.com/OData.svc/Sessions(guid'816995df-b09a-447a-9391-019512f643a0')/Speakers</id>
          <updated>2010-03-25T11:56:06Z</updated>
          <link rel="self" title="Speakers" href="Sessions(guid'816995df-b09a-447a-9391-019512f643a0')/Speakers" />
          <entry>
            <id>http://api.visitmix.com/OData.svc/Speakers(guid'3395ee85-d994-423c-a726-76b60a896d2a')</id>
            <title type="text">David-Robinson</title>
            <summary type="text"></summary>
            <updated>2010-03-25T11:56:06Z</updated>
            <author>
              <name>David Robinson</name>
            </author>
            <link rel="edit-media" title="Speaker" href="Speakers(guid'3395ee85-d994-423c-a726-76b60a896d2a')/$value" />
            <link rel="edit" title="Speaker" href="Speakers(guid'3395ee85-d994-423c-a726-76b60a896d2a')" />
            <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Sessions" type="application/atom+xml;type=feed" title="Sessions" href="Speakers(guid'3395ee85-d994-423c-a726-76b60a896d2a')/Sessions" />
            <category term="EventModel.Speaker" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
            <content type="image/jpeg" src="http://live.visitmix.com/Content/images/speakers/lrg/default.jpg" />
            <m:properties xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata" xmlns:d="http://schemas.microsoft.com/ado/2007/08/dataservices">
              <d:SpeakerID m:type="Edm.Guid">3395ee85-d994-423c-a726-76b60a896d2a</d:SpeakerID>
              <d:SpeakerFirstName>David</d:SpeakerFirstName>
              <d:SpeakerLastName>Robinson</d:SpeakerLastName>
              <d:LargeImage m:null="true"></d:LargeImage>
              <d:SmallImage m:null="true"></d:SmallImage>
              <d:Twitter m:null="true"></d:Twitter>
            </m:properties>
          </entry>
        </feed>
      </m:inline>
    </link>
    <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Tags" type="application/atom+xml;type=feed" title="Tags" href="Sessions(guid'816995df-b09a-447a-9391-019512f643a0')/Tags" />
    <link rel="http://schemas.microsoft.com/ado/2007/08/dataservices/related/Files" type="application/atom+xml;type=feed" title="Files" href="Sessions(guid'816995df-b09a-447a-9391-019512f643a0')/Files" />
    <category term="EventModel.Session" scheme="http://schemas.microsoft.com/ado/2007/08/dataservices/scheme" />
    <content type="application/xml">
      <m:properties>
        <d:SessionID m:type="Edm.Guid">816995df-b09a-447a-9391-019512f643a0</d:SessionID>
        <d:Location>Breakers L</d:Location>
        <d:Type>Seminar</d:Type>
        <d:Code>SVC07</d:Code>
        <d:StartTime m:type="Edm.DateTime">2010-03-17T12:00:00</d:StartTime>
        <d:EndTime m:type="Edm.DateTime">2010-03-17T13:00:00</d:EndTime>
        <d:Slug>SVC07</d:Slug>
        <d:CreatedDate m:type="Edm.DateTime">2010-01-26T18:14:24.687</d:CreatedDate>
        <d:SourceID m:type="Edm.Guid">cddca9b7-6830-4d06-af93-5fd87afb67b0</d:SourceID>
      </m:properties>
    </content>
  </entry>

我想打印：

• 会议标题（使用 Microsoft SQL Azure 构建 Web 应用程序）
• 作者 (David Robinson)
• 位置 (Breakers L)
• 并显示演讲者图像 (http://live.visitmix.com/Content/images/speakers/lrg/default.jpg)

我想我可以使用 filegetcontents 然后转换为 simplexmlstring，但我不知道如何获取我想要的更深层次的项目，例如作者和图像。

Answer 1

考虑 SimpleXML 使用以下方式加载 XML 数据：

• 属性对象的数组
• 键值的类似

这样的事情应该可以解决问题：

$string = <<<STR
<entry>
    ...
  </entry>
STR;

$xml = @simplexml_load_string($string);

echo (string)$xml->title . '<br />';
echo (string)$xml->link[1]->inline->feed->entry->author->name . '<br />';
echo (string)$xml->content->properties->Location . '<br />';
echo (string)$xml->link[1]->inline->feed->entry->content['src'] . '<br />';

我得到以下输出：

Building Web Applications with Microsoft SQL Azure
David Robinson
Breakers L
http://live.visitmix.com/Content/images/speakers/lrg/default.jpg

在使用 SimpleXML 时，使用 var_dump($xml); 可以帮助您了解数据的表示方式——使访问数据变得更加容易;-)

注意：在这里，我使用了 @ 运算符 来抑制我在使用 simplexml_load_string 时收到的警告；否则，我有很多这样的警告：

Warning: simplexml_load_string() [function.simplexml-load-string]: 
   namespace error : Namespace prefix m on inline is not defined

Warning: simplexml_load_string() [function.simplexml-load-string]: <m:inline>

也许这里有什么需要修复的地方？