foreach xml节点返回所选元素 [英] foreach xml node return selected element
问题描述
我怎样才能从我的xml cdata标签中获得选定的值？
到目前为止，在stackoverflow的帮助下，我可以获得所有的< b> 字符串中的标记
$ result = simplexml_load_file（$ url，'SimpleXMLElement'，LIBXML_NOCDATA ）;
foreach（$ result-> channel-> item as $ item）{
$ desc = $ item-> description;
$ dom = new DOMDocument（$ desc）;
$ dom-> loadHTML（$ desc）;
$ bold_tags = $ dom-> getElementsByTagName（'b'）;
foreach（$ bold_tags as $ b）{
echo $ b-> nodeValue。 <峰; br> 中;
}
但它会回显 < b> ，但我只想让我们说价格。
我用红色在stackoverflow中使用 - > item（x）来获得该值，但没有任何工作。如果我把它放在这个 echo $ b-> nodeValue->项目（2）。 < br>; 或 echo $ b-> item（2） - > nodeValue。 <峰; br> 中; 。那么我应该在哪里放置它，或者我应该如何使用价格获得< b> 元素。价格总是在同一个地方。
以下是我在Feed中的CDATA：
< a href =// www.ss.lv/msg/lv/real-estate/flats/riga/purvciems/deblb.html\">
< img align =rightborder =0src =// i.ss.lv/images/2014-10-01/349288/VHkAHkBlRlo=/1.t.jpgwidth = 160height =120alt =>
< / a>地区：< b>< b> Purvciems< / b>< / b>< br />
街道：< b>< b> Dudajeva g。 12< / b>< / b>< br />
房间：< b>< b> 2< / b>< / b>< br />
m2：< b>< b> 50< / b>< / b>< br />
类型：< b>< b> LT proj。< / b>< / b>< br />
：< b>< b> 3< / b> €< / b>< br />
价格：< b>< b> 150< / b> €/mēn。< / b>< br />
< br />
< b>< a href =// www.ss.lv/msg/lv/real-estate/flats/riga/purvciems/deblb.html\">Apskatītsludinājumu< / a>< / b>< br />
< br />
]]>
您可以尝试使用此方法解析这些价格：
$ url =http://www.ss.lv/lv/real-estate/flats/riga/hand_over/rss /;
$ result = simplexml_load_file（$ url，'SimpleXMLElement'，LIBXML_NOCDATA）;
$ data = array（）;
foreach（$ result-> channel-> item as $ item）{
$ temp = array（）;
$ title =（string）trim（$ item-> title）;
$ desc = $ item-> description;
$ temp ['title'] = $ title;
$ dom = new DOMDocument（'1.0'，'utf-8'）;
$ desc = mb_convert_encoding（$ desc，'HTML-ENTITIES'，UTF-8）;
$ dom-> loadHTML（$ desc）;
$ xpath = new DOMXpath（$ dom）;
$ price_tag = $ xpath-> query（'// text（）[contains（。，Cena）]'）; // target Cena，
//我不知道这是翻译中的PRICE哈哈
$ price = $ price_tag-> item（0） - > nextSibling-> nodeValue;
$ temp ['price'] = $ price;
$ data [] = $ temp;
}
echo'< pre>';
print_r（$ data）;
好的，为了解释：
因此，我们的目标是获取位于CDATA内的< description> 标签中的价格。
< item> 节点包含它们，它们看起来像这样： << ; href =// www.ss.lv/msg/lv/real-estate/flats/riga/centre/colfo.html\">
< img align = right border = 0 src =// i.ss.lv/images/2014-08-25/346391/VHkPH0FiQVo=/1.t.jpgwidth =160height = 120alt =>
< / a>
Rajons：< b> centrs< / b>
< br /> Iela：< b>Rūpniecības7< / b>< br /> Ist .:< b> 4< / b>
< b /> m2：< b> 145< / b>< b>Sērija：< b> Renov。< / b>< br>：< b> ; 10.34€< / b>
< br /> Cena：< b> 1,500€/mēn。< / b>< br />
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ //这个
< br / >< b>< a href =// www.ss.lv/msg/lv/real-estate/flats/riga/centre/colfo.html\">Apskatītsludinājumu< / a>< / b> ;<峰; br /><峰; br />
所以我们的目标是通过使用xpath来搜索价格（Cena）。所以根据标记这是一个普通的文本节点（不是一个元素或不是一个标签）。
所以我们定位包含Cena的文本元素：
// text（）[contains（。，Cena）]
因此，每个Cena / Price都有下一个包含该特定值的兄弟< b> 标签，所以我们定位每个Cena / Price并指向下一个< b> 标签
item（0） - > nextSibling-> nodeValue
Cena / Price - > nextSibling（这是b标签） - >其价值
How can I get only selected value from my xml cdata tag?
So far with help in stackoverflow I can get all the <b> tags in a string
$result = simplexml_load_file($url, 'SimpleXMLElement', LIBXML_NOCDATA);
foreach ($result->channel->item as $item) {
$desc = $item->description;
$dom = new DOMDocument($desc);
$dom->loadHTML($desc);
$bold_tags = $dom->getElementsByTagName('b');
foreach($bold_tags as $b) {
echo $b->nodeValue . "<br>";
}
but it will echo out all data which are inside <b>, but I want to get only let's say price.
I red in stackoverflow to use ->item(x) to get that value, but nothing is working.If I put it like this echo $b->nodeValue->item(2) . "<br>"; or echo $b->item(2)->nodeValue . "<br>";. So where should I put it or what should I use to get only <b> element with price. The price will always be in the same place.
Here is my CDATA from feed:
<a href="//www.ss.lv/msg/lv/real-estate/flats/riga/purvciems/deblb.html">
<img align="right" border="0" src="//i.ss.lv/images/2014-10-01/349288/VHkAHkBlRlo=/1.t.jpg" width="160" height="120" alt="">
</a> District: <b><b>Purvciems</b></b><br />
Street: <b><b>Dudajeva g. 12</b></b><br />
Rooms: <b><b>2</b></b><br />
m2: <b><b>50</b></b><br />
Type: <b><b>LT proj.</b></b><br />
: <b><b>3</b> €</b><br />
Price: <b><b>150</b> €/mēn.</b><br />
<br />
<b><a href="//www.ss.lv/msg/lv/real-estate/flats/riga/purvciems/deblb.html">Apskatīt sludinājumu</a></b><br />
<br />
]]>
You can try this method to parse those prices:
$url = "http://www.ss.lv/lv/real-estate/flats/riga/hand_over/rss/";
$result = simplexml_load_file($url, 'SimpleXMLElement', LIBXML_NOCDATA);
$data = array();
foreach($result->channel->item as $item) {
$temp = array();
$title = (string) trim($item->title);
$desc = $item->description;
$temp['title'] = $title;
$dom = new DOMDocument('1.0', 'utf-8');
$desc = mb_convert_encoding($desc, 'HTML-ENTITIES', "UTF-8");
$dom->loadHTML($desc);
$xpath = new DOMXpath($dom);
$price_tag = $xpath->query('//text()[contains(., "Cena")]'); // target Cena,
// i didn't know this was PRICE in translation haha
$price = $price_tag->item(0)->nextSibling->nodeValue;
$temp['price'] = $price;
$data[] = $temp ;
}
echo '<pre>';
print_r($data);
Okay, for the explanation:
So the goal is getting those prices which resides in the <description> tag inside the CDATA.
So each <item> node contains them which looks like this:
<a href="//www.ss.lv/msg/lv/real-estate/flats/riga/centre/colfo.html">
<img align=right border=0 src="//i.ss.lv/images/2014-08-25/346391/VHkPH0FiQVo=/1.t.jpg" width="160" height="120" alt="">
</a>
Rajons: <b>centrs</b>
<br/>Iela: <b>Rūpniecības 7</b><br/>Ist.: <b>4</b>
<br/>m2: <b>145</b><br/>Sērija: <b>Renov.</b><br/>: <b>10.34 €</b>
<br/>Cena: <b>1,500 €/mēn.</b><br/>
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ // this one
<br/><b><a href="//www.ss.lv/msg/lv/real-estate/flats/riga/centre/colfo.html">Apskatīt sludinājumu</a></b><br/><br/>
So the goal is, by using xpath, search for the Prices (Cena). So according to markup this a normal text node (Not an element or is not a tag).
So we target that text element which contains "Cena":
//text()[contains(., "Cena")]
So each Cena/Price it has the next sibling <b> tags which contain that particular value, so we target each Cena/Price and point the next sibling which is <b> tag
item(0)->nextSibling->nodeValue
Cena/Price -> nextSibling (which is b tag) -> its value
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