PHP and SimpleXMl errors on changing a value

$xmld->photos->photo[$i]->filename = $phf;

[John_Keates]

Hello, I'm making a XML-PHP based photoablum system. But I'vegot a little problem with the XML writing.
I use SimpleXML and not XML Dom because I won't use XML alot.

code:

<?php

//this script should rebuild the photobook database

//make sure this will continue till the end; don't abort on user

ignore_user_abort("true");

include("../config.inc.php");

include($paths['functions']);

connect_mysqli();

//data from my config.inc.php file:

$paths['pbook'] = $paths['private'] . "pbook/";

$paths['palbums'] = $paths['pbook'] . "albums/";

$paths['pupload'] = $paths['pbook'] . "uploaded/";

$paths['pimages'] = $paths['pbook'] . "images/";

$paths['pthumbs'] = $paths['pbook'] . "thumbs/";

//get dirs

$albums = glob($paths['palbums'] . "*");

foreach($albums as $album){

if(is_dir($album)){

//fix dirs

$ar = substr($album, strlen($paths['palbums']));

photo_directory_fix($ar);

//do the images

$images_p = glob($paths['palbums'] . $ar . "/*");

foreach($images_p as $img){

$photos[$ar][] = $img;

$i = substr($img , strlen($paths['palbums'] . $ar));

$i = substr($i , 1);

photoalbum_photo_fix($ar, $i);

};

//get the vars to update the xml file

$num_p = count($photos[$ar]);

$phs = $photos[$ar];

if(!file_exists($paths[palbums] . $ar . ".xml")){

make_album_xml($ar);

};

$xmld = acess_album_xml($ar);

$i = "0";

foreach($phs as $phf){

$xmld->photos->photo[$i]->filename = $phf;

$i++;

};

$xmld->config->amount = $num_p;

write_album_xml($ar, $xmld);

};

};

$mysqli->close();

exit("Complete");

?>

<?php

//part of my used functions:

//album xml getter

function acess_album_xml($album){

global $paths;

$xml = $paths[palbums] . $album . ".xml";

$albumxml = simplexml_load_file($xml);

return $albumxml;

};

//album xml writer

function write_album_xml($album, $xml){

global $paths;

$xmlfile = $paths[palbums] . $album . ".xml";

if(is_file($xmlfile)){

unlink($xmlfile);

};

$xml->asXML($xmlfile);

};

//album xmlgen

function make_album_xml($album){

global $templates;

global $paths;

$xmlfile = $paths[palbums] . $album . ".xml";

$xml = simplexml_load_string($templates['album_xml']);

$xml->asXML($xmlfile);

};

//repairs all the paths for the supplied album

function photo_directory_fix($album){

global $paths;

if(!is_dir($paths['palbums'] . $album)){

mkdir($paths['palbums'] . $album);

};

if(!is_dir($paths['pthumbs'] . $album)){

mkdir($paths['pthumbs'] . $album);

};

if(!is_dir($paths['pthumbs'] . $album . "/small/")){

mkdir($paths['pthumbs'] . $album . "/small/");

};

if(!is_dir($paths['pthumbs'] . $album . "/large/")){

mkdir($paths['pthumbs'] . $album . "/large/");

};

};

function photoalbum_photo_thumb($a, $i){

global $paths;

global $photobook;

$complete_th_small = $paths['pthumbs'] . $a . "/small/" . $i;

$complete_th_large = $paths['pthumbs'] . $a . "/large/" . $i;

$complete_ab_img = $paths['palbums'] . $a . "/" . $i;

$complete_ab = $paths['palbums'] . $a;

$smallthumb = $complete_th_small;

$largethumb = $complete_th_large;

$sizes = getimagesize($complete_ab_img);

$smallthumbdimensions['l'] = get_setting('th_small_x');

$smallthumbdimensions['h'] = get_setting('th_small_y');

$largethumbdimensions['l'] = get_setting('th_large_x');

$largethumbdimensions['h'] = get_setting('th_large_y');

$currentdimensions['l'] = $sizes['0'];

$currentdimensions['h'] = $sizes['1'];

$x = $largethumbdimensions['l'];

$y = $largethumbdimensions['h'];

$complete_ab_img = str_replace(" ", "\ ", $complete_ab_img);

$largethumb = str_replace(" ", "\ ", $largethumb);

$smallthumb = str_replace(" ", "\ ", $smallthumb);

if($currentdimensions['l'] > $x && $currentdimensions['h'] > $y){

$thumbcommand = $paths['convert'] . " -resize " . $x . "x" . $y . " " . $complete_ab_img . " " . $largethumb;

if(file_exists($largethumb)){

unlink($largethumb);

};

echo exec($thumbcommand);

};

$x = $smallthumbdimensions['l'];

$y = $smallthumbdimensions['h'];

if($currentdimensions['l'] > $x && $currentdimensions['h'] > $y){

$thumbcommand = $paths['convert'] . " -resize " . $x . "x" . $y . " " . $complete_ab_img . " " . $smallthumb;

if(file_exists($smallthumb)){

unlink($smallthumb);

};

echo exec($thumbcommand);

};

};

?>

xml:

<?xml version="1.0" encoding="UTF-8"?>
<photoablum>
<description>Some text to describe this album</description>
<config>
<active>yes</active>
<amount>3</amount>
<securitylevel>0</securitylevel>
</config>
<photos>
<photo>
<filename>picture1.jpg</filename>
</photo>
<photo>
<filename>picture2.jpg</filename>
</photo>
<photo>
<filename>picture3.jpg</filename>
</photo>
</photos>
</photoablum>

error:
Fatal error: Objects used as arrays in post/pre increment/decrement must return values by reference in /www/thej/system/pbookrebuilder.php on line 65

[John_Keates]

Nobody knows? Need more info?

[John_Keates]

Sorry, my mistake, I should RTFM more often. SimpleXML cannot create stuff. Edit only.