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Posted by Jochem Maas on 10/21/09 11:22
John Smith wrote:
> This is with simplexml_load_file(). Using an empty()
> check instead of is_array() does the trick (though -
> note to php hackers - I think is_array() SHOULD work).
ah simplexml, in that case is_array() shouldn't and won't
work because it's 'all' objects (although I can understand why it seems
like it should work!) - but the objects allow array(-like) iteration
of contained elements.
read this again very carefully:
http://be2.php.net/simplexml
note also that even values are actually objects that implement
the __toString() interface (although I'm not sure that is the
correct way to explain/name it) where by the object is automatically
cast to a string in a sensible way when used with echo/print ...
as the exmaples on the simplexml page show you have to cast manually
if you want to do other things with the string representation (like
using the actually value of the object as the test value of a switch
block.
here is some more reading material:
http://www.onlamp.com/pub/a/php/2004/01/15/simplexml.html
good luck
>
> John
>
>
> --- Jochem Maas <jochem@iamjochem.com> wrote:
>
>
>>John Smith wrote:
>>
>>>I'm trying to avoid error messages while iterating
>>>over DOM properties. e.g.
>>
>>
>>>if(is_array($dom->stuff->props)) {
>>
>>maybe you can get roudn the problem by saying?:
>>
>>if($dom->stuff->props) {
>>
>>or?:
>>
>>if(!empty($dom->stuff->props)) {
>>
>>
>>> foreach($dom->stuff->props as $prop) {
>>> ...
>>> }
>>>}
>>>
>>>It works without the is_array() check, but not
>>
>>with
>>
>>my guess is you'll find that $dom->stuff->props is
>>an object
>>which overloads the array accessor stuff...
>>basically it's implementing Iterator (or some other
>>SPL Interface)
>>
>>hard to tell though because you don't mention which
>>DOM
>>related extension you are using.
>>
>>
>>>it. I've done var_dumps and $dom->stuff->props is
>>>indeed an array. I've also tried using an
>>
>>intermediate
>>
>>>variable ($stuff=$dom->stuff) then checking that,
>>
>>but
>>
>>>that doesn't work either).
>>>
>>>John
>>>
>>>
>>>
>>>
>>
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>>
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>
>
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