php中simplexml_load_string使用_PHP教程

　　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
$string = << hello world 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。

　　假如我們擷取的XML資料如下：(可以使用curl、fsockopen等方式擷取)

代碼如下
你好 Array；Array；Array； Haven't seen you for a long time. How are you? 多日不見了，你好嗎？ Hello! How are you? 嘿，你好？ Hello, Brooks!How are you? 喂，布魯克斯！你好嗎？ Hi, Barbara, how are you? 嘿，芭芭拉，你好嗎？ How are you? -Quite well, thank you. 你好嗎？-很好，謝謝你。

　　經過simplexml_load_string得到：

代碼如下

SimpleXMLElement Object ( [@attributes] => Array ( [num] => 219 [id] => 219 [name] => 219 ) [key] => 你好www.111cn.Net [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：

代碼如下

$data = << 你好 Array；Array；Array； Haven't seen you for a long time. How are you? 多日不見了，你好嗎？ Hello! How are you? 嘿，你好？ Hello, Brooks!How are you? 喂，布魯克斯！你好嗎？ Hi, Barbara, how are you? 嘿，芭芭拉，你好嗎？ How are you? -Quite well, thank you. 你好嗎？-很好，謝謝你。 XML; $xmldata = simplexml_load_string($data); header("Content-Type: text/html; charset=UTF-8"); print_r($xmldata); echo " ".trim($xmldata->sent[0]->orig); //Haven't seen you for a long time. How are you? echo " ".trim($xmldata->key); //你好 ?>

http://www.bkjia.com/PHPjc/733191.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/733191.htmlTechArticle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 foobarhello/bar/foo foobarworld/bar/foo /data EOF; $data = simplexml_...

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