I want to get the ISBN number of a book from an Amazon XML File. I already checked other posts and tried to solve the problem with them but without any success. The $xml looks like:
<itemlookupresponse>
<items>
<item>
<itemattributes>
<studio>Pottermore from J.K. Rowling</studio>
<eisbn>9781781100769</eisbn>
</itemattributes>
</item>
<item>
<itemattributes>
<studio>Carlsen Verlag GmbH</studio>
<isbn>3551551677</isbn>
</itemattributes>
</item>
<item>
<itemattributes>
<studio>Carlsen</studio>
<isbn>3551551677</isbn>
</itemattributes>
</item>
</items>
</itemlookupresponse>
I want to get the items, where the ISBN equals 3551551677. For that reason, I used the following command, which unfortunately returns an empty array.
$item = $xml->xpath('//items/item[itemattributes/isbn=3551551677]');
I would be glad, if someone could help me and explain, what I made wrong.
XML and XPath are case-sensitive. Amazon's XML is not all lowercase, despite what you've posted in your question. Adjust your XPath to match the exact case used in Amazon's actual XML.
Note also that if there are namespaces involved in the actual XML, those too must be accounted for in your XPath. See How does XPath deal with XML namespaces?
You didn't show something important (namespaces?) because this code works for me:
$string = <<<XML
<itemlookupresponse>
<items>
<item>
<itemattributes>
<studio>Pottermore from J.K. Rowling</studio>
<eisbn>9781781100769</eisbn>
</itemattributes>
</item>
<item>
<itemattributes>
<studio>Carlsen Verlag GmbH</studio>
<isbn>3551551677</isbn>
</itemattributes>
</item>
<item>
<itemattributes>
<studio>Carlsen</studio>
<isbn>3551551677</isbn>
</itemattributes>
</item>
</items>
</itemlookupresponse>
XML;
$xml = new SimpleXMLElement($string);
/* Поиск <a><b><c> */
$items = $xml->xpath('//items/item[ ./itemattributes/isbn[.="3551551677"] ]');
//$items = $xml->xpath('//items/item[itemattributes/isbn=3551551677]');
echo "Result size: " . count($items) . "\n";
foreach ( $items as $item) {
echo $item->asXML() . "\n";
}
Related
How can one loop through XML structure with tags named like
<response>
<tag-1>
<item>
<id>106</id>
<title>DG</title>
</item>
<item>
<id>105</id>
<title>AC</title>
</item>
</tag-1>
<tag-2>
<item>
<id>1</id>
<title>DjG</title>
</item>
<item>
<id>15</id>
<title>AoC</title>
</item>
</tag-2>
</response>
So I load xml with simplexml_load_file, then I tried with xml->children().
$xml = simplexml_load_file("data.xml");
foreach($xml->children() as $kat);
{
var_dump($kat);
}
This has only returned the last element. So I can not loop through all of the tag-* elements.
Any help how to loop through all tags named tag-* will be very appreciated
i'm trying to remove one item from a xml with all of it's child nodes but when i excecute following php only the child nodes will be removed.
following is my php
<?php
header('Content-Type: text/xml');
$doc = new DOMDocument('1.0');
$url = '../../data/auction.xml';
$itemNo ="0";
$xml=simplexml_load_file($url);
foreach($xml->xpath('/items/item[itemNumber="'.$itemNo.'"]')as $child)
{
unset($child[0]);
//$child->parentNode->removeChild($node);
}
print $xml->asXML();
?>
the original XML
<?xml version="1.0"?>
<items>
<item>
<itemNumber>0</itemNumber>
<itemName>item1</itemName>
<category>Phones</category>
</item>
<item>
<itemNumber>2</itemNumber>
<itemName>item3</itemName>
<category>laptops</category>
</item>
</items>
Actual output
<items>
<item>
</item>
<item>
<itemNumber>2</itemNumber>
<itemName>item3</itemName>
<category>laptops</category>
</item>
</items>
Desired output
<items>
<item>
<itemNumber>2</itemNumber>
<itemName>item3</itemName>
<category>laptops</category>
</item>
</items>
Please tell me what i'm doing wrong
I have an XML like the one below, I am trying to do an xpath query and parse it with simplexml. The XML is a CURL response and is stored in a $response variable. I need to look the Code attribute inside the <Item> and select the parent <Product> to parse it.
$response:
<Items>
<Product>
<Item Code="123">
</Item>
<Price>170
</Price>
</Product>
<Product>
<Item Code="456">
</Item>
<Price>150
</Price>
</Product>
</Items>
This is what I am doing:
$xml = simplexml_import_dom($response);
function loadNode($code){
global $xml;
$scode = $xml->xpath('//Item[contains(#Code,"' . $code . '")]/..');
echo $scode->Items->Product->Price;
}
loadNode("123");
This is the Notice I get:
Notice: Trying to get property of non-object
A couple of observations:
The xpath() method returns an array of SimpleXMLElement
objects, not a single SimpleXMLElement. (Yes, even though there can only be a single parent of an element, you still have to get it as the first member of the array ([0]).
$scode->Items->Product->Price should be changed to just
$scode->Price.
These modifications to your PHP code:
<?php
$response = <<<XML
<Items>
<Product>
<Item Code="123">
</Item>
<Price>170
</Price>
</Product>
<Product>
<Item Code="456">
</Item>
<Price>150
</Price>
</Product>
</Items>
XML;
$xml = simplexml_load_string($response);
function loadNode($code) {
global $xml;
$scode = $xml->xpath('//Item[contains(#Code,' . $code . ')]/..')[0];
echo $scode->Price;
}
loadNode("123");
?>
When run will yield this output:
170
as expected.
Is there a way i can get a specific item with SimpleXML ?
For example, i would like to get the title of an item having ID set to 12437 with this example xml :
<items>
<item>
<title>blah blah 43534</title>
<id>43534</id>
</item>
<item>
<title>blah blah 12437</title>
<id>12437</id>
</item>
<item>
<title>blah blah 7868</title>
<id>7868</id>
</item>
</items>
Here are 2 simple ways of doing what you want, one is iterating with each item like this:
<?php
$str = <<<XML
<items>
<item>
<title>blah blah 43534</title>
<id>43534</id>
</item>
<item>
<title>blah blah 12437</title>
<id>12437</id>
</item>
<item>
<title>blah blah 7868</title>
<id>7868</id>
</item>
</items>
XML;
$data = new SimpleXMLElement($str);
foreach ($data->item as $item)
{
if ($item->id == 12437)
{
echo "ID: " . $item->id . "\n";
echo "Title: " . $item->title . "\n";
}
}
Live DEMO.
The other would be using an XPath, to pin point the exact data you want like this:
<?php
$str = <<<XML
<items>
<item>
<title>blah blah 43534</title>
<id>43534</id>
</item>
<item>
<title>blah blah 12437</title>
<id>12437</id>
</item>
<item>
<title>blah blah 7868</title>
<id>7868</id>
</item>
</items>
XML;
$data = new SimpleXMLElement($str);
// Here we find the element id = 12437 and get it's parent
$nodes = $data->xpath('//items/item/id[.="12437"]/parent::*');
$result = $nodes[0];
echo "ID: " . $result->id . "\n";
echo "Title: " . $result->title . "\n";
Live DEMO.
You want to use Xpath for this. It's basically exactly the same as outlined in SimpleXML: Selecting Elements Which Have A Certain Attribute Value but in your case you're not deciding on an attribute value but on an element value.
However in Xpath for both the element you're looking for is the parent.So formulating the xpath expression is kind of straight forward:
// Here we find the item element that has the child <id> element
// with node-value "12437".
list($result) = $data->xpath('(//items/item[id = "12437"])[1]');
$result->asXML('php://output');
Output (beautified):
<item>
<title>title of 12437</title>
<id>12437</id>
</item>
So let's see the heart of this xpath query again:
//items/item[id = "12437"]
It's written as: Select all <item> elements that are a children of any <items> elements which on their own have a child element named <id> with the value "12437".
And now with the missing stuff around:
(//items/item[id = "12437"])[1]
The parenthesis around says: From all these <item> elements, pick the first one only. Depending on your structure this might or might not be necessary.
So here is the full usage example and online demo:
<?php
/**
* php simplexml get a specific item based on the value of a field
* #lin https://stackoverflow.com/q/17537909/367456
*/
$str = <<<XML
<items>
<item>
<title>title of 43534</title>
<id>43534</id>
</item>
<item>
<title>title of 12437</title>
<id>12437</id>
</item>
<item>
<title>title of 7868</title>
<id>7868</id>
</item>
</items>
XML;
$data = new SimpleXMLElement($str);
// Here we find the item element that has the child <id> element
// with node-value "12437".
list($result) = $data->xpath('(//items/item[id = "12437"])[1]');
$result->asXML('php://output');
So what you call a field in your questions title is by the book a child-element. Keep this in mind when searching for more complicated xpath queries that get you what you're looking for.
For example I have 2 types of nodes in my xml file:
1) <book>
2) <author>
A variable named $node points to specific node(of unknown type).
How can I access this node's name? It must be something like this:
if($node->name()=="book")
process_book($node);
else
process_author;
SimpleXMLElement has a getName() method:
echo $node->getName();
Assumption: $node is a SimpleXMLElement object.
I may be missing something, but here is a simlpe solution. Change simplexml_load_string to simplexml_load_file if your using a file.
$xml_string = <<<XML
<root>
<item>
<book>Book 1</book>
<author>Author 1</author>
</item>
<item>
<book>Book 2</book>
<author>Author 2</author>
</item>
<item>
<book>Book 3</book>
<author>Author 3</author>
</item>
</root>
XML;
$xml = simplexml_load_string($xml_string);
foreach($xml->item as $node){
if(isset($node->book)){
process_book($node);
}
}