SimpleXML Question

[callison]

Hi, I have an xml file that is supposed to hold information for my offices software library. I have a simple form with 7-8 fields that makes a single line xml entry like:

 

<software software_number="5" department="it" dev="adobe" prod="dreamweaver" sn="1234" pass="234" machine="it3" date="08-07-2008">Comments</software>

 

Of course theres also a look up script, and a form to edit the entry. But if I go to edit the form...

function updateSoft()
{
$xmlstr = file_get_contents('software.xml');
$xml = new XMLElement($xmlstr);

$id = strtolower($_POST['id']);

$dev = strtolower($_POST['dev']); 
$prod = strtolower($_POST['prod']); 
$sn = strtolower($_POST['sn']);
$pass = strtolower($_POST['pass']);
$machine = strtolower($_POST['machine']);
$dept = strtolower($_POST['dept']);
$comments = strtolower($_POST['comments']);

$update = $xml->xpath("//software[starts-with(@software_number, '".$id."')]");
$update[0]['dev'] = $dev;
$update[0]['prod'] = $prod;
$update[0]['department'] = $dept;
$update[0]['sn'] = $sn;
$update[0]['pass'] = $pass;
$update[0]['machine'] = $machine;
$update[0] = $comments;

$xmlfile = fopen('software.xml', 'w');
fwrite($xmlfile, $xml->asPrettyXML());
fclose($xmlfile);
echo "<br /><br /><a href='index.php'>Click here, go home</a>";

}

 

This is the function that handles the incoming form, and updating the XML file.

Everything works good, but this line:

 

$update[0] = $comments;

 

Trying to update the comments doesn't work like I thought it would. What am I doing wrong?

 

Let me know if more explanation / code is needed.