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本篇內容介紹了“php中simplexml_load_string的使用方法”的有關知識,在實際案例的操作過程中,不少人都會遇到這樣的困境,接下來就讓小編帶領大家學習一下如何處理這些情況吧!希望大家仔細閱讀,能夠學有所成!
先用一段代碼重現(xiàn)一下問題
乍一看,結果很讓人費解:
復制代碼 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:
復制代碼 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(shù)組,但是最后卻僅僅顯示了一個bar元素!
原因其實很簡單,在如上所示simplexml_load_string的結果里,foo并不是數(shù)組,而是一個迭代對象!
可以這樣確認:
復制代碼 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之類的表象并不完全可信,自己多留心吧。
假如我們獲取的XML數(shù)據如下:(可以使用curl、fsockopen等方式獲?。?/p>
復制代碼 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:
復制代碼 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:
復制代碼 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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