Can I use SimpleXML & Xpath to directly select an Elements Attribute?

Question

i.e. - i want to return a string "yellow" using something like xpath expression "//banana/@color" and the following example xml...

<fruits> <kiwi color="green" texture="hairy"/> <banana color="yellow" texture="waxy"/> </fruits> $fruits = simplexml_load_string( '<fruits> <kiwi color="green" texture="hairy"/> <banana color="yellow" texture="waxy"/> </fruits>'); print_r($fruits->xpath('//banana/@color'));

produces

Array ( [0] => SimpleXMLElement Object ( [@attributes] => Array ( [color] => yellow ) ) )

whereas i would prefer something like...

Array ( [0] => SimpleXMLElement Object ( [0] => yellow ) )

...so that i don't need to write a special case into the application i'm writing.

thanks very much! :)

Jeremy French · Accepted Answer · 2014-05-30 13:51:56Z

I just gave your test a shot because i was curious and I found that it does actually produce the string value yellow when converted to string.

$fruits = simplexml_load_string( '<fruits> <kiwi color="green" texture="hairy"/> <banana color="yellow" texture="waxy"/> </fruits>'); $found = $fruits->xpath('//banana/@color'); echo $found[0];

It would seem this is just how SimpleXmlElement attribute nodes are represented. So you can use this as (string) $found[0] if you are not printing/echoing it directly.

Of course if your depending on the value remaining a SimpleXMLElement then that could be an issue I suppose. But i would think just remembering to cast as string when you go to use the node later would still be doable.

IF you really need a detailed interface for Nodes that supports an Attribute as a node then you may want to just switch to DOMDocument. You code will get more verbose, but the implementation is more clear.

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