CODEWITHSUNDEEP
phpxmlxpathnodes
leonhard4
leonhard4

Reputation: 33

how to echo a node value (not atribute)

I've got this problem:

This is my .xml

<listado>
    <sucursal> //first sucursal
        <idSuc>1</idSuc>
        <nombre>Peru</nombre>
    </sucursal>

.//here there are 48 more “sucursal”--- 50 nodes total...

    <sucursal>
        <idSuc>53</> // last sucursal
        <nombre>Abasto</nombre>
    </sucursal>
</listado>

…..

I need to take (in variable php) not the count of the “sucursal” or “idSuc” (in this case “50”) but the value of the last “idSuc” ( in my case “53”)... I don't want to set the "idSuc" as atribute of "sucursal" ( xe) because they are datums take from a form ($_POST), etc..

I'm trying with “xpath” and “lastchild”, etc... but nothing... and “length” is ok but it's not what I need.. because it's useless in my work.

for ex:

<?php $datos= new DOMDocument(); 
$datos->load('datos2.xml'); 
$sucs = $datos->getElementsByTagName("sucursal"); 
$id = $datos->getElementsByTagName("idSuc"); ?> .. 
?>

and then in the form where I need this "value": 

<form method="POST"....> <input name="idSuc" value="<?php print_r($id->length+1)?>"..>

Also with:

And many others that I dont remember now because I remove all.. :(

Please,... somebody can help me!!.. or give just an diferent idea... ??!

thanks a lot!!... I had working with this 4 days and nothig!! :(

Upvotes: 0

Views: 320

Answers (2)

paul trmbrth
paul trmbrth

Reputation: 20748

Try something like:

$xpath = new DOMXpath($datos);
$lastIdSuc = $xpath->query('/listado/sucursal[last()]/idSuc')->item(0)->nodeValue;

and

<input name="idSuc" value="<?php echo $lastIdSuc; ?>">

Upvotes: 1

Skaparate
Skaparate

Reputation: 489

First of all, you should load the XML like this:

$datos->load('datos2.xml', LIBXML_NOBLANKS);

This way, all blank nodes (even empty spaces) are ignored. Now, this line

$sucs = $datos->getElementsByTagName("sucursal");

gives you all the sucursal nodes as a DOMNodeList, so, to get the last one, you do this:

$last = $sucs->item($sucs->length - 1);

which gives you a DOMNode object. Now you need its children, which you can get like this:

$suc_children = $last->childNodes;

childNodes is another DOMNodeList. If you are sure that the element idSuc will always be the first element, then you get it using

$id_suc = $suc_children->firstChild->nodeValue;

First check if there are any $suc_children, otherwise you will get no ID:

if($suc_children->hasChildNodes())
  $id_suc = $suc_children->firstChild->nodeValue;
  // You could do $suc_children->item(0)->nodeValue too

If you are not sure that the first element will be idSuc, then you will have to iterate through the DOMNodeList to find it.

Upvotes: 0

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