PHP XML的xpath如何提取所需的匹配

Question

我對如何與寬度的圖像訪問SourceUrl問題= 400

圖像/二/ 47/6B/77/454430384d6d324b413332544a695675313851-400x400-0-0.jpg 2 P = p2.7f19fe93a466ae45afab &一個= 1 & C = 1 &升= 7000610 & R = 1個& PR = 1個& LKS = 43998 & FKS = 35198

默認它顯示我的圖像與寬度= 100和我的某種方式xpath語法不能提取400

<?php 
$string = <<<XML 
<imageList> 
<image available="true" height="100" width="100"> 
     <sourceURL>images/di/47/6b/77/454430384d6d324b413332544a695675313851-100x100-0-0.jpg?p=p2.7f19fe93a466ae45afab&a=1&c=1&l=7000610&r=1&pr=1&lks=43998&fks=35198</sourceURL> 
</image> 
<image available="true" height="200" width="200"><sourceURL>images/di/47/6b/77/454430384d6d324b413332544a695675313851-200x200-0-0.jpg?p=p2.7f19fe93a466ae45afab&a=1&c=1&l=7000610&r=1&pr=1&lks=43998&fks=35198</sourceURL></image> 
<image available="true" height="300" width="300"><sourceURL>images/di/47/6b/77/454430384d6d324b413332544a695675313851-300x300-0-0.jpg?p=p2.7f19fe93a466ae45afab&a=1&c=1&l=7000610&r=1&pr=1&lks=43998&fks=35198</sourceURL></image> 
<image available="true" height="400" width="400"><sourceURL>images/di/47/6b/77/454430384d6d324b413332544a695675313851-400x400-0-0.jpg?p=p2.7f19fe93a466ae45afab&a=1&c=1&l=7000610&r=1&pr=1&lks=43998&fks=35198</sourceURL></image> 
<image available="true" height="569" width="500"><sourceURL>images/di/47/6b/77/454430384d6d324b413332544a695675313851-500x569-0-0.jpg?p=p2.7f19fe93a466ae45afab&a=1&c=1&l=7000610&r=1&pr=1&lks=43998&fks=35198</sourceURL></image></imageList> 
XML; 


$xml = simplexml_load_string($string); 

$result = $xml->xpath("//image[@height='400']/sourceURL"); 



?> 

Answer 1

你的XPath是所有的權利，但的XML是無效的，看到你的鏈接中http://www.xmlvalidation.com
的&會被解析爲一個字符實體的開始 - >錯誤。

解決：從<![CDATA[...]]>解析排除內<sourceURL>文：

$x = <<<XML 
<imageList> 
<image available="true" height="100" width="100"> 
    <sourceURL> 
     <![CDATA[images/di/47/6b/77/454430384d6d324b413332544a695675313851-100x100-0-0.jpg?p=p2.7f19fe93a466ae45afab&a=1&c=1&l=7000610&r=1&pr=1&lks=43998&fks=35198]]> 
    </sourceURL> 
</image> 
... 
</imageList> 
XML; 

$xml = simplexml_load_string($x); 
$result = $xml->xpath("//image[@height='400']/sourceURL")[0]; 
echo $result; 

輸出：

images/di/47/6b/77/454430384d6d324b413332544a695675313851-400x400-0-0.jpg?p=p2.7f19fe93a466ae45afab&a=1&c=1&l=7000610&r=1&pr=1&lks=43998&fks=35198 

看到它的工作：http://codepad.viper-7.com/31PLr3

更多關於CDATA：What does <![CDATA[]]> in XML mean?