Problems with SimpleXML and foreach

[magic07]

Hi,

 

I have two problems with reading a XML file with SimpleXML and the foreach loop:

 

Problem number one: If I have an item with only one "segment" child, I get the error "Fatal error: Call to a member function attributes() on a non-object in /var/www/readxml.php on line 28". My way of using a $segnum variable which I increment is maybe not necessary since it is a foreach loop... But what would be the right way?

 

Problem number two: My code only sums up the size of the first two segments, but it should sum up all. What's the problem here?

 

My xml file for testing looks like this:

<?xml version="1.0" encoding="iso-8859-1" ?>
<xml>
<file poster="John Doe <john@example.com>" date="1301234567" subject="bla bla &#34;filename1.zip&#34; yEnc (1/5)">
   <groups>
     <group>a.b.blabla</group>
     <group>a.b.dadada</group>
   </groups>
   <segments>
     <segment bytes="100000" number="1">3e5d7d4f336475502b643b466d@example.com</segment>
     <segment bytes="200000" number="2">272b5c2e3e447a66407b20633d@example.com</segment>
     <segment bytes="300000" number="3">3e2724613926406d692765446e@example.com</segment>
     <segment bytes="400000" number="4">213939595c6b51575c43665d48@example.com</segment>
     <segment bytes="50000" number="5">3366285f6a7b317945405c3b30@example.com</segment>
   </segments>
</file>
<file poster="John Doe <john@example.com>" date="1301234678" subject="bla bla &#34;filename2.zip&#34; yEnc (1/5)">
   <groups>
     <group>a.b.blabla</group>
     <group>a.b.dadada</group>
   </groups>
   <segments>
     <segment bytes="300000" number="1">2c7778262263625f7a64343137@example.com</segment>
     <segment bytes="400000" number="2">78685e6e7b4339272b7042772c@example.com</segment>
     <segment bytes="500000" number="3">7a47472e25265a3b6e55214e75@example.com</segment>
     <segment bytes="600000" number="4">6c4e64784e70384c3e2a2a544e@example.com</segment>
     <segment bytes="50000" number="5">76695f59277724334035724a22@example.com</segment>
   </segments>
</file>
<file poster="John Doe <john@example.com>" date="1301234789" subject="bla bla &#34;filename3.zip&#34; yEnc (1/1)">
   <groups>
     <group>a.b.blabla</group>
     <group>a.b.dadada</group>
   </groups>
   <segments>
     <segment bytes="200000" number="1">283d4f6f384f417b422f697163@example.com</segment>
   </segments>
</file>
</xml>

 

My PHP code:

<?php

// read the xml file
$xml = simplexml_load_file('demo.xml');

// initialize helper variables
$filenum = 0;

// loop through all files
foreach($xml as $files){ 

// get the posting date
$timestamp = (int)$xml->file[$filenum]->attributes()->date;
echo date("Y-m-d H:i:s", $timestamp);
echo " - ";

// get the filename
$subject = $xml->file[$filenum]->attributes()->subject;
preg_match("#.*\"(.*)\".*#iu", $subject, $matches);
echo $matches[1];
echo " - ";

// loop through all segments of file to get total size
$segnum = 0;
$totalbytes = 0;
foreach($xml->file[$filenum] as $segments){
	$totalbytes += $xml->file[$filenum]->segments->segment[$segnum]->attributes();
	$segnum++;
} // end segments

echo $totalbytes;
echo "<br />\n";
$filenum++;

} // end files

?>

 

Current output:

2011-03-27 16:02:47 - filename1.zip - 300000
2011-03-27 16:04:38 - filename2.zip - 700000
2011-03-27 16:06:29 - filename3.zip -
Fatal error: Call to a member function attributes() on a non-object in /var/www/readxml.php on line 28

 

Thank you very much for your help!