I have following XML file:
<?xml version="1.0" encoding="UTF-8"?>
<programmedata>
<programme id="1">
<name>Left</name>
<image_path></image_path>
<rating_point>0</rating_point>
<five_star>0</five_star>
With following code I am trying to edit value of rating_point:
$xml=simplexml_load_file("content.xml");
if(!empty($_POST["rating"]) && !empty($_POST["voted_programme"])){
try{
$rating = $_POST["rating"];
$i = $_POST['voted_programme'];
$xml->programme[$i]->rating_point = $rating;
if($rating == '5')
{
$xml->programme[$i]->five_star = $rating;
}
but getting error:Notice: Indirect modification of overloaded element of SimpleXMLElement has no effect in ...
tried different solution but seems not working.
Your statement $xml->programme[1]->rating_point does not select the <programme> node with the attribute id="1".
It refers to the 2nd <programme> node in your XML, regardless of its id attribute.
There are basically 2 ways to get to <programme id="1">:
$xml = simplexml_load_string($x); // assume XML in $x
$rating = 5;
$id = 1;
#1 looping the entire XML
foreach ($xml->programme as $item) {
if ($item[`id`] == $id) {
$item->rating_point = $rating;
if ($rating == 5) $item->five_star = $rating;
}
}
Comment: see line 2 (if...) on how to access attributes.
see it working: https://eval.in/458300
#2 select with xpath:
$item = $xml->xpath("//programme[@id='$id']")[0];
if (!is_null($item)) {
$item->rating_point = $rating;
if ($rating == 5) $item->five_star = $rating;
}
Comments:
//programme: select every <programme> node, wherever in the XML tree[@id='1']: a condition, @ is for attributexpath function returns an array of SimpleXML elements, with the [0] we grab the first element in that array and put it into $item.see it working: https://eval.in/458310
As you can see, solution #2 is faster, even more so if your XML contains several <programme> nodes.