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Re: newbie question for XML.. why array == 1st element

From: petersprc <petersprc@-----.--->
To: NULL
Date: 2/29/2008 11:52:00 PM

Hi,

This is because simple XML nodes are stored internally as objects in a
linked list.

When you use the arrow (->) operator, the first matching child is
returned by the read_property object handler.

When all of a node's properties are fetched as a result of executing
print_r, children with the same name are combined into an array by the
get_properties object handler.

SimpleXMLElement implements the Travesable interface, which allows you
to iterate over these objects using foreach.

More info on object handler functions is here:
http://www.php-mag.net/magphpde/magphpde_article/psecom,id,382,nodeid,21.html

Regards,

John Peters

On Feb 29, 10:16 pm, Summercool <Summercooln...@gmail.com> wrote:
> it seems quite strange that the array also prints out as element 1 in
> the array in the following:
>
> the second print_r() statement... printing out an array actually
> prints out the first element...
>
> Code:
> ========================================================================
> <pre>
> <?php
>
> $xml =<<<XML
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <notes>
>     <note>
>         <to>Tove</to>
>         <from>Jani</from>
>         <heading>Reminder</heading>
>         <body>Don't forget this weekend!</body>
>     </note>
>     <note>
>         <to>Tove2</to>
>         <from>Jani2</from>
>         <heading>Reminder2</heading>
>         <body>Don't forget this weekend2!</body>
>     </note>
> </notes>
>
> XML;
>
> $xml = new SimpleXMLElement($xml);
>
> print_r($xml);
> print_r($xml->note);
> print_r($xml->note[0]);
> print_r($xml->note[1]);
>
> echo "\n\nlooping\n\n";
> foreach($xml->note as $note)
>     print_r($note);
>
> ?>
>
> Output:
> ========================================================================
> SimpleXMLElement Object
> (
>     [note] => Array
>         (
>             [0] => SimpleXMLElement Object
>                 (
>                     [to] => Tove
>                     [from] => Jani
>                     [heading] => Reminder
>                     [body] => Don't forget this weekend!
>                 )
>
>             [1] => SimpleXMLElement Object
>                 (
>                     [to] => Tove2
>                     [from] => Jani2
>                     [heading] => Reminder2
>                     [body] => Don't forget this weekend2!
>                 )
>
>         )
>
> )
> SimpleXMLElement Object
> (
>     [to] => Tove
>     [from] => Jani
>     [heading] => Reminder
>     [body] => Don't forget this weekend!
> )
> SimpleXMLElement Object
> (
>     [to] => Tove
>     [from] => Jani
>     [heading] => Reminder
>     [body] => Don't forget this weekend!
> )
> SimpleXMLElement Object
> (
>     [to] => Tove2
>     [from] => Jani2
>     [heading] => Reminder2
>     [body] => Don't forget this weekend2!
> )
>
> looping
>
> SimpleXMLElement Object
> (
>     [to] => Tove
>     [from] => Jani
>     [heading] => Reminder
>     [body] => Don't forget this weekend!
> )
> SimpleXMLElement Object
> (
>     [to] => Tove2
>     [from] => Jani2
>     [heading] => Reminder2
>     [body] => Don't forget this weekend2!
> )
>
> ------------------------------------------------------------------------
> if you are egoistic and self-righteous, thinking any other behavior
> unlike your own is stupid, please do not reply to this post, or
> your posting will be ignored.
> ------------------------------------------------------------------------

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