先用一段代码重现一下问题

乍一看，结果很让人费解：

代码如下 复制代码 <?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，结果很让人费解：

代码如下 复制代码 SimpleXMLElement Object ( [foo] => Array ( [0] => SimpleXMLElement Object ( [bar] => hello ) [1] => SimpleXMLElement Object ( [bar] => world ) ) ) SimpleXMLElement Object ( [bar] => hello )

明明print_r显示foo是一个有两个bar元素的数组，但是最后却仅仅显示了一个bar元素！ 原因其实很简单，在如上所示simplexml_load_string的结果里，foo并不是数组，而是一个迭代对象！ 可以这样确认：

代码如下 复制代码 foreach ($data->foo as $v) print_r($v); foreach ($data->children() as $v) print_r($v);

看来，print_r或者var_dump之类的表象并不完全可信，自己多留心吧。

假如我们获取的XML数据如下：（可以使用curl、fsockopen等方式获取）

代码如下 复制代码 <?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>多日不见了，你好吗？</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，布鲁克斯！你好吗？</trans></sent><sent> <orig>Hi, Barbara, how are you?</orig> <trans>嘿，芭芭拉，你好吗？</trans></sent><sent> <orig>How are you? -Quite well, thank you.</orig> <trans>你好吗？-很好，谢谢你。</trans></sent></dict>

经过simplexml_load_string得到：

代码如下 复制代码 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] => 多日不见了，你好吗？ )

[1] => SimpleXMLElement Object ( [orig] => Hello! How are you? [trans] => 嘿，你好？ )

[2] => SimpleXMLElement Object ( [orig] => Hello, Brooks!How are you? [trans] => 喂，布鲁克斯！你好吗？ )

[3] => SimpleXMLElement Object ( [orig] => Hi, Barbara, how are you? [trans] => 嘿，芭芭拉，你好吗？ )

[4] => SimpleXMLElement Object ( [orig] => How are you? -Quite well, thank you. [trans] => 你好吗？-很好，谢谢你。 )

)

)

我们在PHP语言中可以用以下方法取得我们想要的值：

代码如下 复制代码 <?php$data = <<<XML<?xml version="1.0" encoding="UTF-8"?><dict num="219" id="219" name="219"><key>你好</key><pos></pos><acceptation>Array；Array；Array；</acceptation><sent> <orig>Haven't seen you for a long time. How are you?</orig> <trans>多日不见了，你好吗？</trans></sent><sent> <orig>Hello! How are you?</orig> <trans>嘿，你好？</trans></sent><sent> <orig>Hello, Brooks!How are you?</orig> <trans>喂，布鲁克斯！你好吗？</trans></sent><sent> <orig>Hi, Barbara, how are you?</orig> <trans>嘿，芭芭拉，你好吗？</trans></sent><sent> <orig>How are you? -Quite well, thank you.</orig> <trans>你好吗？-很好，谢谢你。</trans></sent></dict>XML;$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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