diff --git a/test_www.php b/test_www.php
index ad88d34..97ba112 100644
--- a/test_www.php
+++ b/test_www.php
@@ -4,24 +4,46 @@ header('Content-Type: text/html; charset=utf-8');
 $responseHeaders = '';
 $responseCode = 0;
 $url = '';
-$timeout = 5; // domyślny timeout
+$timeout = 5; 
+$userAgent = '';
+$customUserAgent = '';
+
+$standardUserAgents = [
+    'Chrome' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36',
+    'Firefox' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:117.0) Gecko/20100101 Firefox/117.0',
+    'Safari' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.0 Safari/605.1.15',
+    'Edge' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Safari/537.36 Edg/117.0.0.0',
+    'curl' => 'curl/7.88.1'
+];
 
 if (isset($_GET['url']) && filter_var($_GET['url'], FILTER_VALIDATE_URL)) {
     $url = $_GET['url'];
 
-    // Pobierz i sprawdź timeout z formularza
     if (isset($_GET['timeout'])) {
         $t = intval($_GET['timeout']);
-        if ($t > 0 && $t <= 30) { // ograniczenie timeout do 30s
+        if ($t > 0 && $t <= 30) {
             $timeout = $t;
         }
     }
 
+    if (isset($_GET['userAgent'])) {
+        $userAgent = $_GET['userAgent'];
+    }
+
+    if (isset($_GET['customUserAgent']) && trim($_GET['customUserAgent']) !== '') {
+        $customUserAgent = trim($_GET['customUserAgent']);
+        $userAgent = $customUserAgent;
+    } elseif (isset($_GET['userAgent']) && array_key_exists($_GET['userAgent'], $standardUserAgents)) {
+        $userAgent = $standardUserAgents[$_GET['userAgent']];
+    } else {
+        $userAgent = "PHP script"; // fallback
+    }
+
     $opts = [
         "http" => [
             "method" => "GET",
             "timeout" => $timeout,
-            "header" => "User-Agent: PHP script\r\n"
+            "header" => "User-Agent: " . $userAgent . "\r\n"
         ]
     ];
     $context = stream_context_create($opts);
@@ -62,9 +84,26 @@ if (isset($_GET['url']) && filter_var($_GET['url'], FILTER_VALIDATE_URL)) {
         <input type="text" id="url" name="url" size="50" 
                value="<?php echo htmlspecialchars($url); ?>" required>
         <br><br>
+
         <label for="timeout">Timeout (1-30 sekund):</label>
         <input type="number" id="timeout" name="timeout" min="1" max="30" value="<?php echo $timeout; ?>" required>
         <br><br>
+
+        <label for="userAgent">User-Agent (wybierz z listy):</label>
+        <select id="userAgent" name="userAgent">
+            <?php foreach ($standardUserAgents as $key => $ua): ?>
+                <option value="<?php echo $key; ?>" <?php echo (isset($_GET['userAgent']) && $_GET['userAgent'] === $key) ? 'selected' : ''; ?>>
+                    <?php echo $key; ?>
+                </option>
+            <?php endforeach; ?>
+        </select>
+        <br><br>
+
+        <label for="customUserAgent">Lub wpisz własny User-Agent:</label>
+        <input type="text" id="customUserAgent" name="customUserAgent" size="50" 
+               value="<?php echo htmlspecialchars(isset($_GET['customUserAgent']) ? $_GET['customUserAgent'] : ''); ?>">
+        <br><br>
+
         <input type="submit" value="Sprawdź">
     </form>