ISTWCMS-5983: Adding array_filter and array_map to remove empty lines, and...

ISTWCMS-5983: Adding array_filter and array_map to remove empty lines, and transform all to lower case.

src/Form/UwAddUsersForm.php

@@ -98,21 +98,16 @@ class UwAddUsersForm extends FormBase {
 
     // Be nice and remove whitespace.
     $submitted_users = array_map('trim', $submitted_users);
-
+    // Remove empty lines.
+    $submitted_users = array_filter($submitted_users);
+    // Apply to lower case on all lines.
+    $submitted_users = array_map('strtolower', $submitted_users);
     // Remove any duplicates.
     $submitted_users = array_unique($submitted_users);
 
     // Step through each of the submitted users to create if needed/possible,
     // or show a message if not.
     foreach ($submitted_users as $user) {
-      // Make sure the user ID is in lower case.
-      $user = strtolower($user);
-
-      // Ignore blank lines.
-      if ($user === '') {
-        continue;
-      }
-
       // Don't process long user IDs.
       if (strlen($user) > 8) {
         $this->messenger()->addError($this->t('The user ID <em>@user</em> is too long and was skipped.', ['@user' => $user]));