php - foreach function and dynamically update an xml file - php

Question

I'm using this code to dynamically update an xml file,
my problem is that I'm confused about how to apply the order of the actions to do:
<?php
$files = scandir('./resources');
sort($files);
foreach($files as $file){
if(is_dir("./resources/$file") and $file != "." && $file != ".."){
myFun($file);
}
}
$simplexml = simplexml_load_file('map.xml');
function myFun($scannedTitle){
$tags = get_meta_tags('./resources/'.$scannedTitle.'/index.html');
$scannedDescription = $tags['description'];
$items = $simplexml->xpath('channel/item[#id="'.$scannedTitle.'"]');
$items = $items[0];
if($items->title[0] == $scannedTitle){
}else{
$items->title[0] = $scannedTitle;
}
if($items->description[0] == $scannedDescription){
}else{
$items->description[0] = $scannedDescription;
}
}
$simplexml->saveXML("map.xml");
?>
The code was working, but now I changed the order of the functions and it does no longer work..
I can't understand in which order I have to perform the actions...
Here my "map.xml" file:
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
<channel>
<item id="red">
<title>red</title>
<link>http://website.com/resources/red/</link>
<description>descriptionRed</description>
</item>
<item id="green">
<title>green</title>
<link>http://website.com/resources/green/</link>
<description>Description of the green page.</description>
</item>
<item id="blue">
<title>blue</title>
<link>http://website.com/resources/blue/</link>
<description>Description of the blue page.</description>
</item>
</channel>
</rss>

Answer 1

You have a variable scoping issue how myFun() is going to process $simplexml which is created outside the function.
i think that it will work this way by passing a reference for $simplexml in the function
<?php
$simplexml = simplexml_load_file('map.xml');
$files = scandir('./resources');
sort($files);
foreach($files as $file){
if(is_dir("./resources/$file") and $file != "." && $file != ".."){
myFun($file, $simplexml);
}
}
function myFun($scannedTitle, &$simplexml){
$tags = get_meta_tags('./resources/'.$scannedTitle.'/index.html');
$scannedDescription = $tags['description'];
$items = $simplexml->xpath('channel/item[#id="'.$scannedTitle.'"]');
$items = $items[0];
if($items->title[0] == $scannedTitle){
}else{
$items->title[0] = $scannedTitle;
}
if($items->description[0] == $scannedDescription){
}else{
$items->description[0] = $scannedDescription;
}
}
$simplexml->saveXML("map.xml");
?>