PHP 对象使用

在先前的教程您可能已阅读， XML解析使用PHP ） （中间，充分XML解析器采用一流的，这需要吨行的代码和额外的时间。在PHP5 ，我们可以使用简单的XML类快速解析XML在只有两行代码。

我们的可扩展标记语言文字
我使用相同的文字作为Jubba的XML解析教程，但我可以补充一些属性向您展示的额外权力的简单的XML ：

<description>Equipped with a Japanese Mind-control device, the giant monster has attacked important harbours along the California coast. President to take action. </description>
 </story>
 <story>
  <headline> Bigfoot Spotted at M.I.T. Dining Area </headline>
  <description>The beast was seen ordering a Snapple in the dining area on Tuesday. In a related story, Kirupa Chinnathambi, an MIT engineering student has been reported missing. </description>
 </story>
 <story>
  <headline> London Angel Saves England </headline>
  <description>The "London Angel" known only as "Kit" has saved the U.K. yet again. Reports have stated that she destroyed every single Churchill bobble-head dog in the country. A great heartfilled thank you goes out to her. </description>
 </story>
 <story>
  <headline> Six-eyed Man to be Wed to an Eight-armed Woman </headline>
  <description>Uhhhmmm... No comment really... just a little creepy to see them together... </description>
 </story>
 <story>
  <headline> Ahmed's Birthday Extravaganza! </headline>
  <description>The gifted youngster's birthday party should be a blast. He is turning thirteen and has requested a large cake, ice cream, and a petting zoo complete with pony rides. </description>
 </story>
</news>


我们的PHP代码
我知道你预期两百名左右线的先进PHP和无法理解的评论。你错了，这里的两行你需要一个简单的XML对象：


//Since we're already using PHP5, why don't we exploit their easy to use file_get_contents() command?
$xmlFileData = file_get_contents(“input.xml”);
//Here's our Simple XML parser!
$xmlData = new SimpleXMLElement($xmlFileData);
//And here's the output.
print_r($xmlData);


执行，在你的PHP服务器，你得到一些毫无意义的乱码像以下。
SimpleXMLElement Object (
 [story] => Array (
  [0] => SimpleXMLElement Object (
   [headline] => Godzilla Attacks LA!
   [description] => Equipped with a Japanese Mind-control device, the giant monster has attacked important harbours along the California coast. President to take action.
   )
  [1] => SimpleXMLElement Object (
   [headline] => Bigfoot Spotted at M.I.T. Dining Area
   [description] => The beast was seen ordering a Snapple in the dining area on Tuesday. In a related story, Kirupa Chinnathambi, an MIT engineering student has been reported missing.
   )
  [2] => SimpleXMLElement Object (
   [headline] => London Angel Saves England
   [description] => The "London Angel" known only as "Kit" has saved the U.K. yet again. Reports have stated that she destroyed every single Churchill bobble-head dog in the country. A great heartfilled thank you goes out to her.
   )
  [3] => SimpleXMLElement Object (
   [headline] => Six-eyed Man to be Wed to an Eight-armed Woman
   [description] => Uhhhmmm... No comment really... just a little creepy to see them together...
   )
  [4] => SimpleXMLElement Object (
   [headline] => Ahmed's Birthday Extravaganza!
   [description] => The gifted youngster's birthday party should be a blast. He is turning thirteen and has requested a large cake, ice cream, and a petting zoo complete with pony rides.
   )
  )
 )
)



为了获取数据实际上从混乱的价值观，我们可以使用它作为数组一类适用于它。像这样：


//Retrieving the headline from the first story
$xmlHeadline = $xmlData->story[0]->headline;
//Printing our first headline
print($xmlHeadline);


但是，如果你希望的日期的故事，但并不想加入另一个节点阵列的故事？只需添加一个属性。和简单的XML也能处理的属性！因此，我们新的XML看起来是这样的：

<?xml version="1.0"?>
<news>
 <story>
  <headline date=”January 19, 2005”> Godzilla Attacks LA! </headline>
  <description>Equipped with a Japanese Mind-control device, the giant monster has attacked important harbours along the California coast. President to take action. </description>
 </story>
 <story>
  <headline date=”February 14, 2006”> Bigfoot Spotted at M.I.T. Dining Area </headline>
  <description>The beast was seen ordering a Snapple in the dining area on Tuesday. In a related story, Kirupa Chinnathambi, an MIT engineering student has been reported missing. </description>
 </story>
 <story>
  <headline date=”May 27, 2006”> London Angel Saves England </headline>
  <description>The "London Angel" known only as "Kit" has saved the U.K. yet again. Reports have stated that she destroyed every single Churchill bobble-head dog in the country. A great heartfilled thank you goes out to her. </description>
 </story>
 <story>
  <headline date=”June 3, 2006”> Six-eyed Man to be Wed to an Eight-armed Woman </headline>
  <description>Uhhhmmm... No comment really... just a little creepy to see them together... </description>
 </story>
 <story>
  <headline date=”July 28, 2006”> Ahmed's Birthday Extravaganza! </headline>
  <description>The gifted youngster's birthday party should be a blast. He is turning thirteen and has requested a large cake, ice cream, and a petting zoo complete with pony rides. </description>
 </story>
</news>

所以，现在我们有我们的所有新闻和日期，但我们如何显示它的人？我们可以使用一个简单的foreach循环输出所有的人

//Outputing all of our XML to people
foreach($xmlData->story as $story) {
 print(“<h2>” . $story->headline . “</h2><br />”);
 print($story->description . “<br />_________________________<br />”);
 print($story->headline["date"] . “<br /><br />”);
 
}