xpath XML and PHP4

[CptDondo]

I am working on an embedded platform. I have php4 installed along with
libxml, so I have working DOMXML and xpath stuff...

But I can't figure out how to use it.

I am trying to get the base node of a schedule; I've attached a small
portion of my XML file below. What I would like to do is to get the
root of a schedule, and then iterate with foreach through all of the
children. This is the function I came up with and of course it doesn't
work. I don't understand how I am supposed to work with the object that
the xpath_eval[_expression] returns. I've also tried the child_nodes
method and that fails as well.

Thanks,

--Yan

function loadSchedule($p ivotID, $schedName, $schedNum) {
$dom = domxml_open_fil e("/tmp/test.conf");
$xpath = xpath_new_conte xt($dom);
// find base node for our schedule
$pat = '//root/pivot[@id="' . $pivotID . '"]/'
. $schedName . '[@id="' . $schedNum . '"]';
print $pat;
$baseNode = xpath_eval($xpa th,$pat);
var_dump($baseN ode);
$lines = xpath_eval_expr ession($xpath,'/line',$baseNode );
var_dump($lines );
print "\nOK\n";
foreach($lines->nodeset as $line) {
var_dump($line) ;
}
}

<root>
<pivot id="1">
<water id="1">
<line id="1">
<bearingTo>120. 0</bearingTo>
<WetDry>1</WetDry>
<FwdRev>0</FwdRev>
<event>0</event>
<speed>10</speed>
</line>
<line id="2">
<bearingTo>180. 0</bearingTo>
<WetDry>1</WetDry>
<FwdRev>1</FwdRev>
<event>0</event>
<speed>45</speed>
</line>
</water>
<pivot>
</root>

[petersprc]

Re: xpath XML and PHP4

For a relative path, try the tag name without a leading slash:

xpath_eval_expr ession($xpath,' line',$baseNode );

More on absolute and relative location paths:

http://www.w3schools.com/xpath/xpath_axes.asp

CptDondo wrote:

I am working on an embedded platform. I have php4 installed along with
libxml, so I have working DOMXML and xpath stuff...
>
But I can't figure out how to use it.
>
I am trying to get the base node of a schedule; I've attached a small
portion of my XML file below. What I would like to do is to get the
root of a schedule, and then iterate with foreach through all of the
children. This is the function I came up with and of course it doesn't
work. I don't understand how I am supposed to work with the object that
the xpath_eval[_expression] returns. I've also tried the child_nodes
method and that fails as well.
>
Thanks,
>
--Yan
>
function loadSchedule($p ivotID, $schedName, $schedNum) {
$dom = domxml_open_fil e("/tmp/test.conf");
$xpath = xpath_new_conte xt($dom);
// find base node for our schedule
$pat = '//root/pivot[@id="' . $pivotID . '"]/'
. $schedName . '[@id="' . $schedNum . '"]';
print $pat;
$baseNode = xpath_eval($xpa th,$pat);
var_dump($baseN ode);
$lines = xpath_eval_expr ession($xpath,'/line',$baseNode );
var_dump($lines );
print "\nOK\n";
foreach($lines->nodeset as $line) {
var_dump($line) ;
}
}
>
<root>
<pivot id="1">
<water id="1">
<line id="1">
<bearingTo>120. 0</bearingTo>
<WetDry>1</WetDry>
<FwdRev>0</FwdRev>
<event>0</event>
<speed>10</speed>
</line>
<line id="2">
<bearingTo>180. 0</bearingTo>
<WetDry>1</WetDry>
<FwdRev>1</FwdRev>
<event>0</event>
<speed>45</speed>
</line>
</water>
<pivot>
</root>