PHP4 XML DOM

[mich dobelman]

Currently my web server supports only php4.
I want to know how to parse the xml and get the
element value using dom. I thought they have similar
function for getting element by id or tag name, so
far i haven't find anyting like that except fro PHP5 with
Domdocument. Any help is appreciated.


$dom = domxml_open_fil e ('data.xml');
$e_data = $dom->document_eleme nt();

<?xml version="1.0"?>
<book>
<title>hhelo</title>
</book>

[p.lepin@ctncorp.com]

Re: PHP4 XML DOM


mich dobelman wrote:

Currently my web server supports only php4.
I want to know how to parse the xml and get the
element value using dom. I thought they have similar
function for getting element by id or tag name, so
far i haven't find anyting like that except fro PHP5 with
Domdocument. Any help is appreciated.

I heartily recommend upgrading to PHP5 and DOM extension,
it's much better than PHP4's DOM XML. Nevertheless, I hope
this helps:

$xml = '<?xml version="1.0"?>
<book>
<title>hhelo</title>
</book>' ;

// here we traverse shallowly all the children nodes of a
// given node and add node values of all the text nodes
// found to the result
function get_value ( $node )
{
$result = '' ;
$sub_nodes = $node -child_nodes ( ) ;
foreach ( $sub_nodes as $sub_node )
{
if ( $sub_node -node_type ( ) == XML_TEXT_NODE )
{
$result .= $sub_node -node_value ( ) ;
}
}
return ( $result ) ;
}

$doc = domxml_open_mem ( $xml ) ;

// method #1
// here we get all the <titleelement s in the document,
// then get the contents of the first one of them
$titles = $doc -get_elements_by _tagname ( 'title' ) ;
$result_1 = get_value ( $titles [ 0 ] ) ;

// method #2
// here we get the first element node child of the root
// element, then get its contents
$books = $doc -child_nodes ( ) ;
$book_ix = $title_ix = 0 ;
while ( $books [ $book_ix ++ ] -node_type ( ) !=
XML_ELEMENT_NOD E ) ;
$titles = $books [ -- $book_ix ] -child_nodes ( ) ;
while ( $titles [ $title_ix ++ ] -node_type ( ) !=
XML_ELEMENT_NOD E ) ;
$result_2 = get_value ( $titles [ -- $title_ix ] ) ;

// method #3
// the same thing, only using XPath
$xpath = $doc -xpath_new_conte xt ( ) ;
$result =
$xpath -xpath_eval ( '//book/title/text()' ) ;
$result_3 = $result -nodeset [ 0 ] -content ;

--
Pavel Lepin

[Shuan]

Re: PHP4 XML DOM

Thanks, Pavel

>$doc = domxml_open_mem ( $xml ) ;

The function you provided works perfectly for local file, but
not the remote one. Do i have to use the different function remote
file?

about PHP5
I want to, but My ISP said not ready to upgrade to PHP5.

[p.lepin@ctncorp.com]

Re: PHP4 XML DOM


Shuan wrote:

$doc = domxml_open_mem ( $xml ) ;

>
The function you provided works perfectly for local file,
but not the remote one. Do i have to use the different
function remote file?

Actually, domxml_open_mem () parses XML from a string. For
both local and remote files you should use
domxml_open_fil e() - well, depending on your definition of
'remote' and your ISP's PHP settings ('allow_url_fop en').
The following should work:

$doc = domxml_open_fil e
( 'http://example.org/dir/data.xml' ) ;

--
Pavel Lepin