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php

SimpleXMLIterator

php.internals

Mathieu Bruneau

22 years ago

Hi all,

I have been playing with the SPL lately and today I ended up playing
with the SimpleXMLIterator.

The documentation on that class if fairly poor and I'm in fact
requesting some information about it. I managed to create a
SimpleXMLIterator passing it basic xml in the constructor but wasn't
able to get anything from the getChildren() method and hasChildren()
return false. The var_dump of the iterator show me the expected thing tough.

Nor does the current() or key() return anything. I'm using php5.0.1


Example:
<?php

$xml = "<test><test1>Here we are</test1><test2>There</test2></test>";

$it = new SimpleXMLIterator($xml);

var_dump($it);

while($it->hasChildren())
{
echo "While\n";
$child = $it->getChildren();
}

echo "Begin\n";
echo "Key : ".$it->key()."\n";
echo "Current :".$it->current()."\n";
echo "End\n";
?>

And here's what is outputted

object(SimpleXMLIterator)#1 (2) {
["test1"]=>
string(11) "Here we are"
["test2"]=>
string(5) "There"
}
Begin
Key :
Current :
End

I tried with some other combination of possible xml but nothing worked
so far. Any things I'm doing wrong ?

--
Math
aka ROunofF

======
argontechnologies.ca

Adam Maccabee Trachtenberg

22 years ago

On Sat, 28 Aug 2004, Mathieu Bruneau wrote:

> 	I have been playing with the SPL lately and today I ended up playing
> with the SimpleXMLIterator.
>

[snip]

> Example:
> <?php
>
> $xml = "<test><test1>Here we are</test1><test2>There</test2></test>";
>
> $it = new SimpleXMLIterator($xml);

foreach ($it as $k => $v) print "$k: $v\n";

test1: Here we are
test2: There

-adam

--
adam@trachtenberg.com
author of o'reilly's "upgrading to php 5" and "php cookbook"
avoid the holiday rush, buy your copies today!

Marcus Börger

22 years ago

Hello Mathieu,

Sunday, August 29, 2004, 4:18:25 AM, you wrote:

> Hi all,

> 	I have been playing with the SPL lately and today I ended up playing
> with the SimpleXMLIterator.

> 	The documentation on that class if fairly poor and I'm in fact
> requesting some information about it. I managed to create a
> SimpleXMLIterator passing it basic xml in the constructor but wasn't
> able to get anything from the getChildren() method and hasChildren()
> return false. The var_dump of the iterator show me the expected thing tough.

> Nor does the current() or key() return anything. I'm using php5.0.1

> Example:
> <?php

> $xml = "<test><test1>Here we are</test1><test2>There</test2></test>";

> $it = new SimpleXMLIterator($xml);

> var_dump($it);

> while($it->hasChildren())
> {
>    echo "While\n";
>    $child = $it->getChildren();
> }

Try working with while($it->valid()....
Besides that SimpleXMLIterator implements the RecursiveIterator interface.
What it does is iterating over one element and if teh element has sub
elements then hasChildren() returns true and getchildren() returns the
iterator for that sub element. To see what's going on have a look at
ext/spl/tests/sxe_00*.phpt.

regards
marcus

Mathieu Bruneau

22 years ago

Marcus Boerger wrote:

> Hello Mathieu,
>
> Sunday, August 29, 2004, 4:18:25 AM, you wrote:
>
>
>>Hi all,
>
>
>>	I have been playing with the SPL lately and today I ended up playing
>>with the SimpleXMLIterator.
>
>
>>	The documentation on that class if fairly poor and I'm in fact
>>requesting some information about it. I managed to create a
>>SimpleXMLIterator passing it basic xml in the constructor but wasn't
>>able to get anything from the getChildren() method and hasChildren()
>>return false. The var_dump of the iterator show me the expected thing

tough.

>
>
>>Nor does the current() or key() return anything. I'm using php5.0.1
>
>
>
>>Example:
>><?php
>
>
>>$xml = "<test><test1>Here we are</test1><test2>There</test2></test>";
>
>
>>$it = new SimpleXMLIterator($xml);
>
>
>>var_dump($it);
>
>
>>while($it->hasChildren())
>>{
>>   echo "While\n";
>>   $child = $it->getChildren();
>>}
>
>
> Try working with while($it->valid()....
> Besides that SimpleXMLIterator implements the RecursiveIterator

interface.

> What it does is iterating over one element and if teh element has sub
> elements then hasChildren() returns true and getchildren() returns the
> iterator for that sub element. To see what's going on have a look at
> ext/spl/tests/sxe_00*.phpt.
>
> regards
> marcus
>
>

I already tried that but I figured out what I was doing wrong... You
need to rewind the iterator before using it... I don't know why but I
was assuming that it was ready for a loop!

The other solution foreach is working as the foreach does a rewind() on
it at first.

--
Math
aka ROunofF

======
argontechnologies.ca