Xtykutl

I'm trying to modify a node attribute if the node exist or create it if not in a xml file using Xpath.
xml file looks like that :

<krpano>

    <hotspot name="hs1" ath="0" atv="0"/>

    <hotspot name="hs2" ath="0" atv="0"/>

</krpano>

and here is my php code :

<?php

$str_json = file_get_contents('php://input');

$json_data = json_decode($str_json);



$file = 'myxmlfile.xml';

$xml = simplexml_load_file($file);

$krpano = $xml->xpath("//krpano");

$hotspot = $xml->xpath('//hotspot[@name="'.$json_data->name.'"]');



if ($hotspot){

    $xml->xpath('//hotspot[@name="'.$json_data->name.'"]/@ath->'.$json_data->xpos.'');

    $xml->xpath('//hotspot[@name="'.$json_data->name.'"]/@atv->'.$json_data->ypos.'');

}else{

    $newhs = $krpano[0]->addChild('hotspot');

    $newhs->addAttribute('name', $json_data->name);

    $newhs->addAttribute('ath', $json_data->xpos);

    $newhs->addAttribute('atv', $json_data->ypos);

}



$xml->asXML($file);



?>

if the node doesn't exist then it's added, no problem, but if it exist the attribute values aren't changed.

You can't alter attributes like that with XPath,

$xml->xpath('//hotspot[@name="'.$json_data->name.'"]/@ath->'.$json_data->xpos.'');

$xml->xpath('//hotspot[@name="'.$json_data->name.'"]/@atv->'.$json_data->ypos.'');

you just need to modify them directly from the hotspot you already have...

$hotspot[0]['ath'] = $json_data->xpos;

$hotspot[0]['atv'] = $json_data->ypos;