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php中simplexml

 這篇文章主要介紹了php中simplexml_load_string使用實例,需要的朋友可以參考下

先用一段代碼重現一下問題   乍一看,結果很讓人費解:    代碼如下: <?php  $string = <<<EOF  <data>  <foo><bar>hello</bar></foo>  <foo><bar>world</bar></foo>  </data>  EOF;   $data = simplexml_load_string($string);   print_r($data);  print_r($data->foo);  ?>       乍一看,結果很讓人費解:   代碼如下: SimpleXMLElement Object  (  [foo] => Array  (  [0] => SimpleXMLElement Object  (  [bar] => hello  )  [1] => SimpleXMLElement Object  (  [bar] => world  )  )  )  SimpleXMLElement Object  (  [bar] => hello  )     明明print_r顯示foo是一個有兩個bar元素的數組,但是最後卻僅僅顯示了一個bar元素!  原因其實很簡單,在如上所示simplexml_load_string的結果裡,foo並不是數組,而是一個迭代對象!  可以這樣確認:    代碼如下: foreach ($data->foo as $v) print_r($v);  foreach ($data->children() as $v) print_r($v);     看來,print_r或者var_dump之類的表象並不完全可信,自己多留心吧。   假如我們獲取的XML數據如下:(可以使用curl、fsockopen等方式獲取)     代碼如下: <?xml version="1.0" encoding="UTF-8"?> <dict num="219" id="219" name="219">  <key>你好</key>  <pos></pos>  <acceptation>Array;Array;Array;</acceptation>  <sent>   <orig>Haven't seen you for a long time. How are you?</orig>   <trans>多日不見了,你好嗎?</trans>  </sent>  <sent>   <orig>Hello! How are you?</orig>   <trans>嘿,你好?</trans>  </sent>  <sent>   <orig>Hello, Brooks!How are you?</orig>   <trans>喂,布魯克斯!你好嗎?</trans>  </sent>  <sent>   <orig>Hi, Barbara, how are you?</orig>   <trans>嘿,芭芭拉,你好嗎?</trans>  </sent>  <sent>   <orig>How are you? -Quite well, thank you.</orig>   <trans>你好嗎?-很好,謝謝你。</trans>  </sent> </dict>      經過simplexml_load_string得到: 代碼如下: SimpleXMLElement Object (     [@attributes] => Array         (             [num] => 219             [id] => 219             [name] => 219         )       [key] => 你好     [pos] => SimpleXMLElement Object         (         )       [acceptation] => Array;Array;Array;     [sent] => Array         (             [0] => SimpleXMLElement Object                 (                     [orig] => Haven't seen you for a long time. How are you?                     [trans] => 多日不見了,你好嗎?                 )               [1] => SimpleXMLElement Object                 (                     [orig] => Hello! How are you?                     [trans] => 嘿,你好?                 )               [2] => SimpleXMLElement Object                 (                     [orig] => Hello, Brooks!How are you?                     [trans] => 喂,布魯克斯!你好嗎?                 )               [3] => SimpleXMLElement Object                 (                     [orig] => Hi, Barbara, how are you?                     [trans] => 嘿,芭芭拉,你好嗎?                 )               [4] => SimpleXMLElement Object                 (                     [orig] => How are you? -Quite well, thank you.                     [trans] => 你好嗎?-很好,謝謝你。                 )           )   )       我們在PHP語言中可以用以下方法取得我們想要的值:   碼 代碼如下: <?php $data = <<<XML <?xml version="1.0" encoding="UTF-8"?> <dict num="219" id="219" name="219">  <key>你好</key>  <pos></pos>  <acceptation>Array;Array;Array;</acceptation>  <sent>   <orig>Haven't seen you for a long time. How are you?</orig>   <trans>多日不見了,你好嗎?</trans>  </sent>  <sent>   <orig>Hello! How are you?</orig>   <trans>嘿,你好?</trans>  </sent>  <sent>   <orig>Hello, Brooks!How are you?</orig>   <trans>喂,布魯克斯!你好嗎?</trans>  </sent>  <sent>   <orig>Hi, Barbara, how are you?</orig>   <trans>嘿,芭芭拉,你好嗎?</trans>  </sent>  <sent>   <orig>How are you? -Quite well, thank you.</orig>   <trans>你好嗎?-很好,謝謝你。</trans>  </sent> </dict> XML; $xmldata = simplexml_load_string($data); header("Content-Type: text/html; charset=UTF-8"); print_r($xmldata); echo "<br />".trim($xmldata->sent[0]->orig); //Haven't seen you for a long time. How are you? echo "<br />".trim($xmldata->key); //你好 ?>  
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