get values from Xpath - php

Question

Below is my xml with namespace
<?xml version="1.0" encoding="UTF-8"?>
<hotels xmlns="http://www.test.com/schemas/messages" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" schemaLocation="http://www.test.com/schemas/messages">
<hotel >
<rooms>
<room>
<rates>
<rate id="1" adults="1" child="0"></rate>
<rate id="2" adults="2" child="0"></rate>
<rate id="3" adults="1" child="0"></rate>
</rates>
</room>
<room>
<rates>
<rate id="4" adults="1" child="0"></rate>
<rate id="5" adults="2" child="0"></rate>
<rate id="6" adults="2" child="0"></rate>
</rates>
</room>
</rooms>
</hotel>
</hotels>
i trying below php code (xpath) using foreach to get values of the ratenode
$xd = simplexml_load_file('C:/inetpub/vhosts/test.com/data_download/q.xml');
$xd->registerXPathNamespace("n", "http://www.test.com/schemas/messages");
foreach($xd->xpath("//n:hotels/n:hotel") as $xd_item)
{
echo 'item - A';
foreach($xd_item->xpath("rooms/room") as $xd_room)
{
foreach($xd_room->xpath("rates/rate") as $xd_rate)
{
echo 'rate - C';
}
}
}
In the foreach of $xd_item is not working. I mean the 2nd foreach its end with the value "echo 'item - A';" anyone can help me?

Answer 1

The problem with your codes is, as mentioned by #kjhughes in his comment, that some elements are in the default namespace but your XPath missed to use the corresponding prefix on those elements. Also, your code prints static literal strings i.e 'item - A' and 'rate - C', not any part of the XML being parsed.
" Is possible to write conditions like $xd->xpath("rates/rate[#id='1']") in dom"
Yes it is possible. It is also possible using SimpleXML, for example :
$xd->registerXPathNamespace("n", "http://www.test.com/schemas/messages");
foreach($xd->xpath("//n:rate[#id='1']") as $rate){
echo $rate["id"] .", ". $rate["adults"] .", ". $rate["child"] ."\r\n";
}
eval.in demo
output :
//id, adults, rate
1, 1, 0

Answer 2

The variable $xd_item is of type SimpleXMLElement from which you can access its room properties like this for example:
$xd_item->rooms->room
This will return an object of type SimpleXMLElement from which you can get the rates and you can loop using a foreach. The values that you want from the 'rate' are in the attributes
For example:
$xd = simplexml_load_file('C:/inetpub/vhosts/test.com/data_download/q.xml');
$xd->registerXPathNamespace("n", "http://www.test.com/schemas/messages");
foreach($xd->xpath("//n:hotels/n:hotel") as $xd_item)
{
foreach($xd_item->rooms->room as $room) {
foreach ($room->rates->rate as $rate) {
echo sprintf(
'id: %s<br>adults: %s<br>child: %s<br><br>',
$rate->attributes()->id->__toString(),
$rate->attributes()->adults->__toString(),
$rate->attributes()->child->__toString()
);
}
}
}