XMl Parser - Newbie Question

[beigeface]

Hi,

 

I'm not really a web programmy kind of guy, but I have a bit of a problem. I'm trying to read the contents of an XML file on my server, I did a quick search on XML, but nothing seemed to match, if anyone has better search-fu, I apologise for having made a double post and a link would be appreciated 

 

The XML I'm messing with is quick and dirty (which might be the problem I don't know)

 

<update>  
<version>000.001.000.5</version>  
<url>http://www.XXX.net/XXX.php</url>
<fileExtension>0.1.0.5</fileExtension>
</update>

 

And what I'm trying to do, is make a copy of which Tag I'm at in the "startElement" function, so that when the "textData" one is called, I can compare it, and store the text data in the appropriate variable - hopefully letting me chose which bit of data from the file I echo, assigning the data into "$elem_name" in "startElement" goes fine, but then when I echo it at the start of "textData" there's nothing in it anymore. My question is - how can I store the data in that variable so that it's not lost after leaving a function? I tried using the global keyword but it changes nothing. 

 

<?php
$version;
$url;
$fileExt; 
$elem_name;

function startElement( $parser, $name, $attrs ) 
  {
$elem_name = $name;
echo "1.$elem_name<br>";
}
  
  function endElement( $parser, $name ) 
  {
  }
  
  function textData( $parser, $text)
{
echo "2. $elem_name <br>";
if ($elem_name == "VERSION")
{
$version = $text;
echo "A.$text <br>";
}
if ($elem_name == "URL")
{
$url = $text;
echo "B.$text <br>";
}
if ($elem_name == "FILEEXTENSION")
{
$fileExt = $text;
echo "C.$text <br>";
}
}
  
  $parser = xml_parser_create();
  
  xml_set_element_handler( $parser, "startElement", "endElement" );
  xml_set_character_data_handler( $parser, "textData" );
  
  $f = fopen( 'app_version.xml', 'r' );
  
  while( $data = fread( $f, 4096 ) )
  {
  xml_parse( $parser, $data );
  }
  
  xml_parser_free( $parser );

  echo $version;
  echo $url;
  echo $fileExt;
  
  ?>

 

The echos look like so on the web page:

1.UPDATE
2.
2.
1.VERSION
2.
2.
2.
1.URL
2.
2.
1.FILEEXTENSION
2.
2. 

 

What I want is for those number "2s" to read the same as the number 1s above them, or if there's a better way to move through XML tag-by-tag - then I'm up for learning it.

 

Thanks in advance

[fja3omega]

have you tried doing the echo inside the function?

[beigeface]

have you tried doing the echo inside the function?

 

I've tried echos inside and outside, I can't get it to actually echo anything for "$elem_name" anywhere but inside the "startElement" function.

[PFMaBiSmAd]

If you want to capture and 'return' the tag or data values, you will need to use the xml parser inside of a class/OOP, because the three call back functions are called by the parser and they cannot directly accept or return values to your program. However, in a class, you can store values found in the call back function into class variables.

[beigeface]

If you want to capture and 'return' the tag or data values, you will need to use the xml parser inside of a class/OOP, because the three call back functions are called by the parser and they cannot directly accept or return values to your program. However, in a class, you can store values found in the call back function into class variables.

 

Okay - I'll look into that, thanks for the help. That explains why it's not working then.

[ignace]

$dom = new DomDocument();
if ($dom->load('path/to/xml.file')) {
  foreach ($dom->childNodes as $node) {
    //if ('version' === $node->nodeName) {
  }
}