Category: Technology

I had been hitting my head against the wall when I couldn’t get an edited XML file to save due to file permissions, even though I know that it was OK.

For some odd reason, when I went to save the XML file, it would try to write the file to the root directory, instead of the current working directory (where the file is read from).

As such, using realpath() to keep the complete system path to the XML file when you load it will make sure that DOM isn’t trying to save to the incorrect directory:

$myfile = 'myxml.xml';
$myfile = realpath($myfile);
$doc = new DOMDocument('1.0');
$doc->load($myfile);

// Let's just add a couple of elements for good measure
$root = $doc->documentElement;

$title = $doc->createElement('title');
$title = $root->appendChild($title);

$text = $doc->createTextNode('This is a title');
$text = $title->appendChild($text);

$doc->save($myfile);