PHP 8.3 Processes Diferently Than 7.4

I have a script with an include file that contains a function called 
'get_show_list' that has a referenced array which is causing PHP to 
abort the script. The following used to work in 7.4:


*** Code Snippet from the Include File ***


$base_dir = "/home/tgvpadmin/data/shows";
$content_dir = "/home/tgvpadmin/content/programs";
$archive_dir = "/home/tgvpadmin/content/archives";

// Return list of sorted shows, taking definite articles into account
function get_show_list () {
   global $base_dir;

   $base_dir_handle = @opendir ($base_dir);
   if (!$base_dir_handle)
     die ("Couldn't open directory $base_dir");

   while (($filename = readdir ($base_dir_handle)) !== false) {
     if (($filename != ".") and ($filename != "..") and (is_dir 
("$base_dir/$filename"))
      and ($showname_handle = @fopen ("$base_dir/$filename/showname", 
"r"))) {
       $shows[$filename] = trim (fgets ($showname_handle));
       fclose ($showname_handle);
     } // end if a dir with a showname file
   } // end traversal of directory

   closedir ($base_dir_handle);

// Copy to another array for sorting purposes
   $sorted_shows = $shows;

// Make all show names lowercase for sorting and searching
   reset ($sorted_shows);
   while (list ($key, $value) = each ($sorted_shows))
     $sorted_shows[$key] = strtolower ($sorted_shows[$key]);
// Strip off "the" and "la" etc.
   reset ($sorted_shows);
   while (list ($key, $value) = each ($sorted_shows)) {
     if (strpos ($value, " ")) {
       $space_pos = strpos ($value, " ");
       $first_word = substr ($value, 0, $space_pos);
       switch ($first_word) {
         case "the":
         case "a":
         case "an":
         case "la":
         case "el":
           $sorted_shows[$key] = substr ($value, $space_pos + 1);
           break;
       } // end switch on first word
     } // end if more than one word in a show title
   } // end while list of shows

// Use asort to maintain keys
   asort ($sorted_shows);

// Generate sorted list with original show names
   reset ($sorted_shows);
   while (list ($key, $value) = each ($sorted_shows)) {
     $show_list[$key] = $shows[$key];
   } // end while list of shows

   return $show_list;
} // end get_show_list ()


*** End Code ***


There's a lot more I omitted for brevity and that I don't think it's 
involved, but here's the error I get when I run the calling script:


PHP Fatal error:  Uncaught Error: Call to undefined function each() in 
/home/tgvpadmin/domains/theglobalvoice.info/public_html/gallery.inc:35
Stack trace:
#0 
/home/tgvpadmin/domains/theglobalvoice.info/public_html/mail_gallery_updates.php(32): 
get_show_list()
#1 {main}
   thrown in 
/home/tgvpadmin/domains/theglobalvoice.info/public_html/gallery.inc on 
line 35


"each" is not a function. It's a list. What changed that affected the 
way this worked between 7.4 and 8.3? I looked through the manual 
sections on arrays and lists and didn't find anything that looked like 
it was the problem.


TIA