SimpleXML - how to insert varaible into queries????

[squariegoes]

I'm trying to query a simplexml object to obtain attribute names and values. The following works -

 

foreach($xml->book[0]->attributes() as $a => $b) {

  echo $a,'="',$b,"\"\n";

}

 

 

but i want to make this query work dynamically and replace book with a variable but when I do I get the following error -

 

Warning: main() [function.main]: Node no longer exists in /home/ . . . .

 

My code works when I substitute the 0 after book with a variable which has had intval() used on it but not when I substitute book for a variable.

 

$xno = intval(0);

foreach($xml->book[$xno]->attributes() as $a => $b) {

  echo $a,'="',$b,"\"\n";

}

 

Can anyone help me out?

[squariegoes]

Here's the code that's not working -

$xt = strval("book");

$xno = intval(0);

 

foreach($xml->$xt[$xno]->attributes() as $a => $b) {

  echo $a,'="',$b,"\"\n";

}

 

 

I've tried all sorts of thing to get the string variable to run in the query including using strval, not using it, using it with quotes and without quotes. I am really stuck on this. Is it even right to use strval()? Or is there another method to get the variable to execute?

[squariegoes]

Fixed with this -

$xt = "book";

$xno = 0;

 

foreach($xml->{$xt}[$xno]->attributes() as $a => $b) {

  echo $a,'="',$b,"\"\n";

}

[Maq]

Excellent, please mark as [sOLVED] so everyone knows.  Thanks!