Split entries from .txt file and create a foreach loop from for sitemap.xml with php

Question

i got a question i got a working xml sitemap generation script in php.the entries are generated over a foreach loop through directories. but i need to do it for an .txt file in this way. Split the entries in the .txt file and create a for each loop for every line in .txt file in order to generate the xml sitemap.

this way looks my .txt file:

"value1"
"value2"
"value3"
etc.

Here is the Sitemap Generator script, how can i split the .txt the right way to make it work in the for each Loop. Please need some advice or help would be really great.

<?php
            $directory = "pictures/".$_GET['social']."/".$_GET['cat']."/";
            $filecount = 0;
            $files = glob($directory . "*");
            if ($files){
             $filecount = count($files);
            }

//Where to put in .txt file read and split it here?

  header("Content-Type: text/xml");
  function xmlentities($text)
  {
    $search = array('&','<','>','"','\'');
    $replace = array('&amp;','&lt;','&gt;','&quot;','&apos;');
    return str_replace($search,$replace,$text);   
  }
  print chr(60)."?xml version='1.0' encoding='UTF-8'?".chr(62);
  print chr(60)."urlset xmlns='http://www.google.com/schemas/sitemap/0.84' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.google.com/schemas/sitemap/0.84 http://www.google.com/schemas/sitemap/0.84/sitemap.xsd'".chr(62);


//here foreach for every line in .txt file?


              foreach (array_slice(glob("pictures/".$_GET['social']."/".$_GET['cat']."/*"), 0, $filecount) as $filename) {
              $data           = getimagesize(str_replace("bilder/thumbs","bilder", $filename));
                    $width          = $data[0];
                    $height         = $data[1];
                    $extension      = image_type_to_extension($data[2]);
                    $imgsize        = filesize(str_replace("bilder/thumbs","bilder", $filename));
                $fileextension = substr($filename, -3);
                $withoutExt = preg_replace('/\\.[^.\\s]{3,4}$/', '', $filename);

    // create the loc (URL) value based on the foreach loop value, from txt:
    $loc = "https://www.dp-pics.com/".$_GET['social']."/".$_GET['cat']."/".$fileextension."/".lcfirst(basename($withoutExt)).".html";

    print "<url>";
    print "<loc>".xmlentities($loc)."</loc>";
    
    print "</url>";
  }
  print "</urlset>";
?>