展会信息港展会大全

php中simplexml_load_string使用
来源:互联网   发布日期:2016-03-01 14:27:32   浏览:1899次  

导读: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 ?php $string = EOF data foobarhello/bar/foo foobarworld/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...

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

<?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

SimpleXMLElementObject

(

[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

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

<?xmlversion="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'tseen you for a long time. How areyou?</orig>

<trans>多日不见了,你好吗?</trans>

</sent>

<sent>

<orig>Hello!How areyou?</orig>

<trans>嘿,你好?</trans>

</sent>

<sent>

<orig>Hello,Brooks!How areyou?</orig>

<trans>喂,布鲁克斯!你好吗?</trans>

</sent>

<sent>

<orig>Hi,Barbara, how areyou?</orig>

<trans>嘿,芭芭拉,你好吗?</trans>

</sent>

<sent>

<orig>Howare you? -Quite well, thankyou.</orig>

<trans>你好吗?-很好,谢谢你。</trans>

</sent>

</dict>

经过simplexml_load_string得到:

代码如下

SimpleXMLElementObject

(

[@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 areyou?

[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

<?php

$data= <<<XML

<?xml version="1.0" encoding="UTF-8"?>

<dictnum="219" id="219"name="219">

<key>你好</key>

<pos></pos>

<acceptation>Array;Array;Array;</acceptation>

<sent>

<orig>Haven'tseen you for a long time. How areyou?</orig>

<trans>多日不见了,你好吗?</trans>

</sent>

<sent>

<orig>Hello!How areyou?</orig>

<trans>嘿,你好?</trans>

</sent>

<sent>

<orig>Hello,Brooks!How areyou?</orig>

<trans>喂,布鲁克斯!你好吗?</trans>

</sent>

<sent>

<orig>Hi,Barbara, how areyou?</orig>

<trans>嘿,芭芭拉,你好吗?</trans>

</sent>

<sent>

<orig>Howare you? -Quite well, thankyou.</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

?>

赞助本站

人工智能实验室

相关热词: 开发 编程 android

AiLab云推荐
展开

热门栏目HotCates

Copyright © 2010-2024 AiLab Team. 人工智能实验室 版权所有    关于我们 | 联系我们 | 广告服务 | 公司动态 | 免责声明 | 隐私条款 | 工作机会 | 展会港