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($data); |
乍一看,结果很让人费解:
代码如下 | 复制代码 |
SimpleXMLElement Object ( [foo] => Array ( [0] => SimpleXMLElement Object ( [bar] => hello ) [1] => SimpleXMLElement Object ( [bar] => world ) ) ) SimpleXMLElement Object ( [bar] => hello ) |
明明print_r显示foo是一个有两个bar元素的数组,但是最后却仅仅显示了一个bar元素!
原因其实很简单,在如上所示simplexml_load_string的结果里,foo并不是数组,而是一个迭代对象!
可以这样确认:
代码如下 | 复制代码 |
foreach ($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 [acceptation] => Array;Array;Array; [1] => SimpleXMLElement Object [2] => SimpleXMLElement Object [3] => SimpleXMLElement Object [4] => SimpleXMLElement Object ) ) |
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 ?> |