diff --git a/functions/ldap_groups.php b/functions/ldap_groups.php
new file mode 100644
index 0000000..0ceae8a
--- /dev/null
+++ b/functions/ldap_groups.php
@@ -0,0 +1,61 @@
+<?php
+// auth/ldap_groups.php
+
+/**
+ * Haalt alle voornamen van gebruikers in een opgegeven LDAP-groep op.
+ *
+ * @param string $groupName Naam van de AD-groep (bijv. APP_LootjesTrekken)
+ * @return array Array van voornamen, of lege array als fout
+ */
+function get_group_members($groupName): array
+{
+    $config = require __DIR__ . '/../config/config.php';
+    $ldap_conf = $config['ldap'];
+
+    $result = [];
+
+    // Verbinden met LDAP
+    $ldapconn = ldap_connect($ldap_conf['server'], $ldap_conf['port']);
+    if (!$ldapconn) return $result;
+
+    ldap_set_option($ldapconn, LDAP_OPT_PROTOCOL_VERSION, 3);
+    ldap_set_option($ldapconn, LDAP_OPT_REFERRALS, 0);
+
+    // Bind met admin account
+    if (!@ldap_bind($ldapconn, $ldap_conf['admin_user'], $ldap_conf['admin_pass'])) {
+        ldap_unbind($ldapconn);
+        return $result;
+    }
+
+    // Zoek de groep
+    $group_filter = "(&(objectClass=group)(cn={$groupName}))";
+    $group_attrs = ['member']; // bevat DN's van groepsleden
+    $group_search = ldap_search($ldapconn, $ldap_conf['base_dn'], $group_filter, $group_attrs);
+
+    if (!$group_search) {
+        ldap_unbind($ldapconn);
+        return $result;
+    }
+
+    $groups = ldap_get_entries($ldapconn, $group_search);
+    if ($groups['count'] === 0) {
+        ldap_unbind($ldapconn);
+        return $result;
+    }
+
+    $members = $groups[0]['member'] ?? [];
+    // member[0..count-1] bevatten DN's
+    for ($i = 0; $i < $members['count']; $i++) {
+        $user_dn = $members[$i];
+        $user_search = ldap_read($ldapconn, $user_dn, '(objectClass=person)', ['givenName']);
+        if (!$user_search) continue;
+
+        $user_entries = ldap_get_entries($ldapconn, $user_search);
+        if ($user_entries['count'] > 0) {
+            $result[] = $user_entries[0]['givenname'][0] ?? '';
+        }
+    }
+
+    ldap_unbind($ldapconn);
+    return $result;
+}
diff --git a/test_ldap.php b/test_ldap.php
index 4a2ff90..158c584 100644
--- a/test_ldap.php
+++ b/test_ldap.php
@@ -29,6 +29,20 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
     }
 }
 ?>
+
+<?php
+require __DIR__ . '/functions/ldap_groups.php';
+
+// Haal alle voornamen op
+$members = get_group_members('APP_LootjesTrekken');
+
+echo "<h3>Deelnemers aan de trekking:</h3><ul>";
+foreach ($members as $name) {
+    echo "<li>" . htmlspecialchars($name) . "</li>";
+}
+echo "</ul>";
+?>
+
 <form method="post">
     <label>Gebruikersnaam (zonder domein): <input type="text" name="username" required></label><br>
     <label>Wachtwoord: <input type="password" name="password" required></label><br>