Getting data from XML nodes - php

Question

I am a beginner on PHP and XML.
I have a XML file as below (partly):
<combination>
<id_combination>2289</id_combination>
<quantity>4</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.1B</reference>
<group_name>Color</group_name>
<attribute_name>Blue</attribute_name>
</combination>
<combination>
<id_combination>2289</id_combination>
<quantity>4</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.1B</reference>
<group_name>Size</group_name>
<attribute_name>1</attribute_name>
</combination>
<combination>
<id_combination>2290</id_combination>
<quantity>20</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.2B</reference>
<group_name>Color</group_name>
<attribute_name>Blue</attribute_name>
</combination>
<combination>
<id_combination>2290</id_combination>
<quantity>20</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.2B</reference>
<group_name>Size</group_name>
<attribute_name>2</attribute_name>
</combination>
And i desire to get an array as described below:
$id_combination => 2289
$reference => K10100.1B
$combination_name => Color: Blue / Size: 1
$quantity => 4
$id_combination => 2290
$reference => K10100.2B
$combination_name => Color: Blue / Size: 2
$quantity => 20
I want to join data with the same 'id_combination' nodes and then process it in PHP.
I tried to use "foreach" loop, "array_unique", "implode" and etc.. but wasn't able to get any success.
I would appreciate anyone would help me straight to result with the suggested code.

Answer 1

i just did the following changes to your xml and have append new code and look and worked on my xampp server
$xml='<?xml version="1.0" encoding="UTF8"?>
<combinations>
<combination>
<id_combination>2289</id_combination>
<quantity>4</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.1B</reference>
<group_name>Color</group_name>
<attribute_name>Blue</attribute_name>
</combination>
<combination>
<id_combination>2289</id_combination>
<quantity>4</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.1B</reference>
<group_name>Size</group_name>
<attribute_name>1</attribute_name>
</combination>
<combination>
<id_combination>2290</id_combination>
<quantity>20</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.2B</reference>
<group_name>Color</group_name>
<attribute_name>Blue</attribute_name>
</combination>
<combination>
<id_combination>2290</id_combination>
<quantity>20</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.2B</reference>
<group_name>Size</group_name>
<attribute_name>2</attribute_name>
</combination>
</combinations>';
$xmlobject = simplexml_load_string($xml);
echo '<pre>';
// this print an array of objects
print_r($xmlobject);
// this print the associative array
print_r((array)$xmlobject);

Answer 2

Consider an XSLT solution as this is a typical need for the Muenchian Method in XSLT 1.0 used to group nodes by various keys. As information, XSLT is a special-purpose language designed to transform XML files and like most general purpose languages, PHP maintains an XSLT processor.
XSLT Script (save as .xsl to be loaded in script below)
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output version="1.0" encoding="UTF-8" indent="yes" />
<xsl:strip-space elements="*"/>
<xsl:key name="idkey" match="combination" use="id_combination" />
<xsl:template match="combinations">
<xsl:copy>
<xsl:apply-templates select="combination[generate-id() =
generate-id(key('idkey',id_combination)[1])]"/>
</xsl:copy>
</xsl:template>
<xsl:template match="combination[generate-id() =
generate-id(key('idkey',id_combination)[1])]">
<xsl:copy>
<xsl:copy-of select="id_combination|quantity|unit_price_impact|reference"/>
<combination_name>
<xsl:for-each select="key('idkey',id_combination)">
<xsl:value-of select="concat(group_name, ': ', attribute_name)" />
<xsl:if test="position() != last()">
<xsl:text> / </xsl:text>
</xsl:if>
</xsl:for-each>
</combination_name>
</xsl:copy>
</xsl:template>
</xsl:transform>
PHP Script
// LOAD XML AND XSL FILES
$xml = new DOMDocument('1.0', 'UTF-8');
$xml->load('Input.xml');
$xslfile = new DOMDocument('1.0', 'UTF-8');
$xslfile->load('XSLTScript.xsl');
// TRANSFORM XML with XSLT
$proc = new XSLTProcessor;
$proc->importStyleSheet($xslfile);
$newXml = $proc->transformToXML($xml);
// ECHO OUTPUT STRING
echo $newXml;
$xml = new SimpleXMLElement($newXml);
$xpath = $xml->xpath('//combination');
$array = [];
foreach($xpath as $result){
$inner = [];
foreach ($result as $node => $item) {
$inner[$node] = (string)$item;
}
$array[] = $inner;
}
var_dump($array);
Transformed XML
<?xml version="1.0" encoding="UTF-8"?>
<combinations>
<combination>
<id_combination>2289</id_combination>
<quantity>4</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.1B</reference>
<combination_name>Color: Blue / Size: 1</combination_name>
</combination>
<combination>
<id_combination>2290</id_combination>
<quantity>20</quantity>
<unit_price_impact>0.000000</unit_price_impact>
<reference>K10100.2B</reference>
<combination_name>Color: Blue / Size: 2</combination_name>
</combination>
</combinations>
Array Output
array(2) {
[0]=>
array(5) {
["id_combination"]=>
string(4) "2289"
["quantity"]=>
string(1) "4"
["unit_price_impact"]=>
string(8) "0.000000"
["reference"]=>
string(9) "K10100.1B"
["combination_name"]=>
string(21) "Color: Blue / Size: 1"
}
[1]=>
array(5) {
["id_combination"]=>
string(4) "2290"
["quantity"]=>
string(2) "20"
["unit_price_impact"]=>
string(8) "0.000000"
["reference"]=>
string(9) "K10100.2B"
["combination_name"]=>
string(21) "Color: Blue / Size: 2"
}
}