[Miranda65M]

Update/Delete info in XML document via PHP

This is what I got so far

my .xml document

 Skuilnaam8Skuilnaam110cobus5

and here i got my file which i want to run to delete my database entries and cleaning the xml entries but im have problem with my xml deletion part

load( 'res/leaders.xml' );

$masterElement = $retriever->documentElement;

$masterContent = $masterElement->getElementsByTagName('users')->item(3);

$oldContent = $masterElement->removeChild($masterContent );

echo $retriever->saveXML();

?>

I get the following error message:

Catchable fatal error: Argument 1 passed to DOMNode::removeChild() must be an instance of DOMNode, null given in /srv/disk1/1296487/www/rekvasvra.uni.me/Gr10/Rente/cron.php on line 23

can someone help me find a solution and edit the code for me please im a beginner and is strggling to solve the problem as far as I can see the problem must be

$masterContent = $masterElement->getElementsByTagName('users')->item(3);

[ShikhaTan]

What happens if you use:

$masterContent = $masterElement->getElementsByTagName('users')->item(2);

It maybe 0 indexed so 0,1,2 not 1,2,3. Not sure – haven’t used this myself.

[Amit]

If we take a look at this line:

$masterContent = $masterElement->getElementsByTagName('users')->item(3);

You’re trying to fetch the third item of a list, a list which we just determined was empty. Thus it returns null, and it results in you trying to pass null to a method which expects an object.

How to solve it involves some basic logic, which I am sure you can figure out on your own if you just think about it. There are many ways to test for what you want, after all.

[ShikhaTan]

Just add:

echo $retriever->save( 'res/leaders.xml' );

after:

echo $retriever->saveXML();

and it will save back to the file.

[SapnaVishwas]

I found the solution but there’s something else that is bugging me now

load( 'res/leaders.xml' );

$masterElement = $retriever->documentElement;

$masterContent = $masterElement->getElementsByTagName('user')->item(0);

$oldContent = $masterElement->removeChild($masterContent );

echo $retriever->saveXML();
echo $retriever->save( 'res/leaders.xml' );
?>

This delete each record as I refresh it each time, isn’t there a way to delete all at once or create a table where I can tick off to delete each record? and after I deleted all the records isn’t there a way to tell me there are no more records and link me back to the index? in place of getting the error