Delete files that is not in my XML document with PHP - php

Question

I have an XML file that contains the SKU of products. I also have a folder that corresponds to this XML file.
Snippet from XML:
<Feed>
<Product>
<ItemCode>ALT-AAB-BL</ItemCode>
<BaseItemCode>ALT-AAB</BaseItemCode>
<StockCheckCode>ALT-AAB-BL</StockCheckCode>
</Product>
<Product>
<ItemCode>ALT-AAB-L</ItemCode>
<BaseItemCode>ALT-AAB</BaseItemCode>
<StockCheckCode>ALT-AAB-L</StockCheckCode>
</Product>
<Product>
<ItemCode>ALT-AAB-N</ItemCode>
<BaseItemCode>ALT-AAB</BaseItemCode>
<StockCheckCode>ALT-AAB-N</StockCheckCode>
</Product>
</Feed>
I have been trying it with php but I am a junior and dont know where to start so I will give you some pseudo code.
if $domelement->ItemCode != filename.jpg{
delte.jpg;
}
Yes this pseudo code is terrible. I basically am able to pull in the .xml file and was able to manipulate data.
I basically want to delete the files that is not present in the xml file and preserve the rest. I know how to appedn the ItemCode with .png if I need to.
<?php
$dom = new DOMDocument;
$dom->preserveWhiteSpace = false;
$dom->formatOutput = true;
$dom->load('altitude.xml');
$xpath = new DOMXPath($dom);
$query = sprintf('/Feed/Product/BaseItemCode');
foreach($xpath->query($query) as $record) {
//delete file that is not present in BaseItemCode
}
I just want the files not present in xml->BaseItemCode (which I will append with .png or .jpg) to be deleted from the folder.

Answer 1

You need two lists: whitelist from XML and all items list from system.
$dom = new DOMDocument;
$dom->preserveWhiteSpace = false;
$dom->formatOutput = true;
$dom->load('altitude.xml');
$xpath = new DOMXPath($dom);
$query = sprintf('/Feed/Product/BaseItemCode');
$xmlList = [];
foreach($xpath->query($query) as $record) {
$xmlList[] = $record->ItemCode . '.jpg';
$xmlList[] = $record->ItemCode . '.png'; // If you can, use smarter way
}
$directory = '/full/path/to/dir';
$dirList = array_diff(scandir($directory), array('..', '.'));
$filesToDelete = array_diff($dirList, $xmlList);
foreach ($filesToDelete as $file) {
unlink($directory . DIRECTORY_SEPARATOR . $file);
}

Answer 2

#justinas 's method worked. I had this weird space at the end of every single array element imported from my CSV file. I converted my XML to a CSV file and used it as an array.
<?php
$csv = file('convertcsv.csv');
function test_alter(&$item1, $key, $prefix)
{
$item1 = "$item1$prefix";
}
array_walk($csv, 'test_alter', '.png');
//var_dump($csv);
$directory = 'img';
$dirList = array_diff(scandir($directory), array('..', '.'));
$filesToDelete = array_diff($dirList, $csv);
foreach ($filesToDelete as $file) {
unlink($directory . DIRECTORY_SEPARATOR . $file);
}
echo "klaar"
?>
Can anyone tell me why there is a blank space after every single element in the array if you use:
$csv = file('convertcsv.csv');
as an array?