| PHP5 DOM extension - using firstChild [message #177541] |
Sun, 08 April 2012 21:17  |
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Denis[1]
Messages: 2
Registered: April 2012
Karma: 0
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Junior Member |
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I have a script that uses xpath to retrieve an element using the PHP5
DOM extension and I want to delete all of the children of this
element. I use hasChildNodes and firstChild to do this. Here is my
script:
$xpath = new DOMXPath($doc);
$query = "//invitee[@id=\"$id\"]";
$nodelist = $xpath->query($query);
$hndChild = $nodelist->item(0);
print get_class($hndChild);
while($hndChild->hasChildNodes()) {
print $hndChild->firstChild->nodeValue;
$toGo = $hndChild->firstChild(); <-- failing statement
$hndChild->removeChild($toGo);
}
My get_class print verifies that I have a DOMElement. I have a print
statement that prints the nodeValue of the firstChild as the first
statement of my while loop and I get the correct result. But then my
next statement fails (on the first iteration) with this error message:
Fatal error: Call to undefined method DOMElement::firstChild() in
save.php on line 51
I can't figure out why this second firstChild statement (failing
statement above) fails. Seems like if firstChild is an undefined
method then the firstChild->nodeValue would also fail but it doesn't.
Can anyone enlighten me on what might be going on here?
Denis
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| Re: PHP5 DOM extension - using firstChild [message #177542 is a reply to message #177541] |
Sun, 08 April 2012 21:31  |
Denis McMahon
Messages: 634
Registered: September 2010
Karma: 0
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Senior Member |
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On Sun, 08 Apr 2012 14:17:00 -0700, Denis wrote:
print $hndChild->firstChild->nodeValue;
accesses the firstChild *property* of $hndChild
$toGo = $hndChild->firstChild(); <-- failing statement
accesses the firstChild() *method* of $hndChild
if firstChild a property or a method?
in other words, is it a member variable or a member function?
Maybe:
$toGo = $hndChild->firstChild;
would work? I'm just speculating, based on the slight difference in the
two lines you indicate, "firstChild" vs "firstChild()".
Rgds
Denis McMahon
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| Re: PHP5 DOM extension - using firstChild [message #177543 is a reply to message #177542] |
Sun, 08 April 2012 21:58 |
Denis[1]
Messages: 2
Registered: April 2012
Karma: 0
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Junior Member |
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On Apr 8, 4:31 pm, Denis McMahon <denismfmcma...@gmail.com> wrote:
> On Sun, 08 Apr 2012 14:17:00 -0700, Denis wrote:
>
> print $hndChild->firstChild->nodeValue;
>
> accesses the firstChild *property* of $hndChild
>
> $toGo = $hndChild->firstChild(); <-- failing statement
>
> accesses the firstChild() *method* of $hndChild
>
> if firstChild a property or a method?
>
> in other words, is it a member variable or a member function?
>
> Maybe:
>
> $toGo = $hndChild->firstChild;
>
> would work? I'm just speculating, based on the slight difference in the
> two lines you indicate, "firstChild" vs "firstChild()".
>
> Rgds
>
> Denis McMahon
You are absolutely right. I don't know why I couldn't see that. I
knew firstChild was a property but this just never registered in my
mind. I made the change to a property reference and it works. Thanks
a bunch.
Denis
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