Getting certain attribute value in an element with multiple values using xpath PHP

Question

i'm playing around with flickr API lately and having difficulties in parsing their response to extract the info i need,

here is a sample response:

−
<rsp stat="ok">
−
<sizes canblog="0" canprint="0" candownload="1">
<size label="Square" width="75" height="75" source="http://farm3.static.flickr.com/2306/1555710063_d2c1e7e7cd_s.jpg" url="http://www.flickr.com/photos/30561311@N00/1555710063/sizes/sq/" media="photo"/>
<size label="Thumbnail" width="100" height="67" source="http://farm3.static.flickr.com/2306/1555710063_d2c1e7e7cd_t.jpg" url="http://www.flickr.com/photos/30561311@N00/1555710063/sizes/t/" media="photo"/>
<size label="Small" width="240" height="160" source="http://farm3.static.flickr.com/2306/1555710063_d2c1e7e7cd_m.jpg" url="http://www.flickr.com/photos/30561311@N00/1555710063/sizes/s/" media="photo"/>
<size label="Medium" width="500" height="333" source="http://farm3.static.flickr.com/2306/1555710063_d2c1e7e7cd.jpg" url="http://www.flickr.com/photos/30561311@N00/1555710063/sizes/m/" media="photo"/>
<size label="Original" width="1280" height="853" source="http://farm3.static.flickr.com/2306/1555710063_e081a6600a_o.jpg" url="http://www.flickr.com/photos/30561311@N00/1555710063/sizes/o/" media="photo"/>
</sizes>
</rsp>

now i need the get just the source attribute value where the size attribute value is Medium

here is how i'm trying to do that with xpath

$xml = new SimpleXMLElement($result);
$path = '//size[label="Medium"]@source';
$url  $xml->xpath($path);

i tried all kind of xpath query combinations but i cant get to the right query

any ideas on that?

Yaniv Golan · Accepted Answer · 2009-10-16 00:45:40Z

3

OK so looks like the right combination that made this work is

'//size[@label="Medium"]/@source'

Thanks guys :)

answered Oct 16, 2009 at 0:45

Yaniv Golan

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1 Comment

Ollie Saunders Over a year ago

Glad you solved this. Could you please mark this as you're solving answer.

manji · Accepted Answer · 2009-10-16 00:29:21Z

1

I think you have a mising @ for label because it's an attribute:

'//size[@label="Medium"]@source'

answered Oct 16, 2009 at 0:29

manji

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1 Comment

Yaniv Golan Over a year ago

Thanks i tried that but it's not working saying 'invalid expression'

Ollie Saunders · Accepted Answer · 2009-10-16 00:28:10Z

0

Missing closing quote after Medium.

answered Oct 16, 2009 at 0:28

Ollie Saunders

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