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

[Jerry Stuckle]

Re: How to find non-existing nodes or nodes with no text.

SM wrote:

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
>

Have you tried RTFM? A string with no characters is just that - a
zero-length string.

--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstucklex@attgl obal.net
=============== ===

[SM]

Re: How to find non-existing nodes or nodes with no text.

On May 9, 8:54 pm, Jerry Stuckle <jstuck...@attg lobal.netwrote:

SM wrote:

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

>
Have you tried RTFM? A string with no characters is just that - a
zero-length string.
>
--
=============== ===
Remove the "x" from my email address
Jerry Stuckle
JDS Computer Training Corp.
jstuck...@attgl obal.net
=============== ===

ok thanks FM, i will try the RTFM
Marco