How to find non-existing nodes or nodes with no text

[SM]

Ok, this must be simple but the more i search the more i don't find.
It's about SimpleXML and PHP.
How to find non-existing nodes or nodes with no text

My XML file looks a little bit like this:

i.e. 1
<discography>
<CD>
<title></title>
<year>1978</year>
</CD>
</discography>
i.e. 2:
<discography>
<CD>
<year>1978</year>
</CD>
</discography>
In i.e. 1, the tag <titleis empty. How do i test for empty tags in
PHP?
In i.e. 2, the tag <titledoesn't even exist. How do i test for non-
existing tags?
This is how i get the values from XML in PHP without validation
....
//set the XML file name as a PHP string
$cd_xml = "db/discography/cd.xml";

//load the XML file
$xml = @simplexml_load_file($cd_xml) or die ("Error: The XML file
can't open.") ;
....

//no validation if empty, creates empty <h1tags. Not good!
<h1><?php echo $xml->CD->title; ?></h1>
<h2><?php echo $xml->CD->year; ?></h2>

How to validate?
Any suggestions?

Thanks in advance
Marco

[petersprc]

<?php if (isset($xml->CD->title) && trim($xml->CD->title) != '') { ?>

<h1><?php echo $xml->CD->title ?></h1>

<?php } ?>

On May 9, 7:01 pm, SM <[e-mail]:

Ok, this must be simple but the more i search the more i don't find.
It's about SimpleXML and PHP.
How to find non-existing nodes or nodes with no text

My XML file looks a little bit like this:

i.e. 1
<discography>
<CD>
<title></title>
<year>1978</year>
</CD>
</discography>

i.e. 2:
<discography>
<CD>
<year>1978</year>
</CD>
</discography>

In i.e. 1, the tag <titleis empty. How do i test for empty tags in
PHP?
In i.e. 2, the tag <titledoesn't even exist. How do i test for non-
existing tags?

This is how i get the values from XML in PHP without validation
...
//set the XML file name as a PHP string
$cd_xml = "db/discography/cd.xml";

//load the XML file
$xml = @simplexml_load_file($cd_xml) or die ("Error: The XML file
can't open.") ;
...

//no validation if empty, creates empty <h1tags. Not good!
<h1><?php echo $xml->CD->title; ?></h1>
<h2><?php echo $xml->CD->year; ?></h2>

How to validate?
Any suggestions?

Thanks in advance
Marco